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  • "Can't find root filesystem / error mounting /dev/root" when booting to new kernel

    - by salparadise
    I am trying to upgrade my kernel from 2.6.18-274 to 2.6.39 for some wireless card drivers. When I boot into the new kernel I get the "Can't find root filesystem / error mounting /dev/root" googling led me to this page http://fedoraproject.org/wiki/Common_kernel_problems#Can.27t_find_root_filesystem_.2F_error_mounting_.2Fdev.2Froot From what I am reading seems to be an issue with a driver for my SATA controller or HD, but I can't find what option I need to add to the kernel. Doing a diff from the old initrd to the new one gives me the following: root-> diff /tmp/kafter /tmp/kbefore 6a7,8 > lib/dm-message.ko > lib/dm-region_hash.ko 8a11 > lib/dm-raid45.ko 13d15 < lib/dm-region-hash.ko 16a19 > lib/dm-mem-cache.ko Do I need any of those? not sure if I would need dm-raid45.ko as I am not running a raid. I have the same SATA and IDE options configured for both kernels so not sure what else to look for, any help is appreciated. Additionally here is the HW info: 00:1f.2 IDE interface: Intel Corporation 82801FB/FW (ICH6/ICH6W) SATA Controller (rev 03) (prog-if 8f [Master SecP SecO PriP PriO]) Subsystem: Hewlett-Packard Company Unknown device 3006 Flags: bus master, 66MHz, medium devsel, latency 0, IRQ 233 I/O ports at 1818 [size=8] I/O ports at 1830 [size=4] I/O ports at 1820 [size=8] I/O ports at 1834 [size=4] I/O ports at 14f0 [size=16] Capabilities: [70] Power Management version 2 root-> smartctl -a /dev/sda ... === START OF INFORMATION SECTION === Device Model: WDC WD5000AADS-00S9B0

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  • JPQL IN clause: Java-Arrays (or Lists, Sets...)?

    - by Bernd Haug
    I would like to load all objects that have a textual tag set to any of a small but arbitrary number of values from our database. The logical way to go about this in SQL would be to build an "IN" clause. JPQL allows for IN, but it seems to require me to specify every single parameter to IN directly (as in, "in (:in1, :in2, :in3)"). Is there some way to specify an array, or a list (or some other container) that should be unrolled to the values of an IN clause?

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  • How to write php->mysql queries?

    - by Bluemagica
    Is there any good tutorial that has all the basic rules for writing queries to store $_Post vars from php to mysql? Like when to use backticks and singleqoutes, and how to safely write code with functions like get_magic_quotes_gpc()? Another thing is, assuming there is no javascript validation(since the user can easily turn it off), how should I handle empty form fields being sent as empty $_post variables and throwing errors? Do I have to use isset() call on all the post variables? What is the best way to handle users turning off javascript validation on a form?

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  • Hibernate criteria query to match against all child collection elements

    - by Andrew Harrison
    Hi, This question is very similar to link text but the responses were minimal to that question. I have a parent class with a Set of child entities. The child entities are just a wrapper for a string and live in a different table to the parent entity. I want to have a criteria query that returns the parent entities when all the members of the set of child entities return true to a condition. This condition is matching against one of a list of strings. Here's where I am: Criteria c = criteria(); Criteria ands = c.createCriteria("ands"); Disjunction dis = Restrictions.disjunction(); for (String value : values) { dis.add(Restrictions.like("value", "%" + value + "%")); } ands.add(dis); return list(c); "ands" is the set of entities with a "value" field that is a string. "criteria()" creates a criteria for the parent class. "list()" just calls criteria.list(); This is just matching against any of the elements, rather than all. Hope this makes sense. Any help much appreciated.

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  • NHibernate: QueryOver<> help

    - by Andy Baker
    Hi, I'm just starting out with NHibernate and I'm having trouble with running more complex queries. I have entities with a list of tags attached. The user will provide two lists of tags, include and exclude. I need to find all the entities that have all of the include tags, and exclude any entites that have any tag in the exclude list. Below is my first effort- which is clearly wrong as its listing all Display objects that have any of the include tags rather than all! Any assistance is greatly appeciated. var includeTagIds = (from tag in regime.IncludeTags select tag.Id).ToList<int>(); var excludeTagIds = from tag in regime.ExcludeTags select tag.Id; var displays = session.QueryOver<Display>() .JoinQueryOver<DisplayTag>(display => display.Tags) .WhereRestrictionOn(tag => tag.Id) .IsIn(includeTagIds).List().Distinct(); return displays.ToList();

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  • Shouldn't prepared statements be much more fsater?

    - by silversky
    $s = explode (" ", microtime()); $s = $s[0]+$s[1]; $con = mysqli_connect ('localhost', 'test', 'pass', 'db') or die('Err'); for ($i=0; $i<1000; $i++) { $stmt = $con -> prepare( " SELECT MAX(id) AS max_id , MIN(id) AS min_id FROM tb "); $stmt -> execute(); $stmt->bind_result($M,$m); $stmt->free_result(); $rand = mt_rand( $m , $M ).'<br/>'; $res = $con -> prepare( " SELECT * FROM tb WHERE id >= ? LIMIT 0,1 "); $res -> bind_param("s", $rand); $res -> execute(); $res->free_result(); } $e = explode (" ", microtime()); $e = $e[0]+$e[1]; echo number_format($e-$s, 4, '.', ''); // and: $link = mysql_connect ("localhost", "test", "pass") or die (); mysql_select_db ("db") or die ("Unable to select database".mysql_error()); for ($i=0; $i<1000; $i++) { $range_result = mysql_query( " SELECT MAX(`id`) AS max_id , MIN(`id`) AS min_id FROM tb "); $range_row = mysql_fetch_object( $range_result ); $random = mt_rand( $range_row->min_id , $range_row->max_id ); $result = mysql_query( " SELECT * FROM tb WHERE id >= $random LIMIT 0,1 "); } defenitly prepared statements are much more safer but also every where it says that they are much faster BUT in my test on the above code I have: - 2.45 sec for prepared statements - 5.05 sec for the secon example What do you think I'm doing wrong? Should I use the second solution or I should try to optimize the prep stmt?

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  • mysql - query group/concat question??

    - by tom smith
    I have a situation where I return results with mutiple rows. I'm looking for aw way to return a single row, with the multiple items in separate cols within the row. My initial query: SELECT a.name, a.city, a.address, a.abbrv, b.urltype, b.url FROM jos__universityTBL as a LEFT JOIN jos__university_urlTBL as b on b.universityID = a.ID WHERE a.stateVAL = 'CA' ...my output: | University Of Southern Califor | Los Angeles | | usc | 2 | http://web-app.usc.edu/ws/soc/api/ | | University Of Southern Califor | Los Angeles | | usc | 4 | http://web-app.usc.edu/ws/soc/api/ | | University Of Southern Califor | Los Angeles | | usc | 1 | www.usc.edu | | San Jose State University | San Jose | | sjsu | 2 | http://info.sjsu.edu/home/schedules.html | | San Jose State University | San Jose | | sjsu | 4 | https://cmshr.sjsu.edu/psp/HSJPRDF/EMPLOYEE/HSJPRD/c/COMMUNITY_ACCESS.CLASS_SEARCH.GBL?FolderPath=PORTAL_ROOT_OBJECT.PA_HC_CLASS_SEARCH | | San Jose State University | San Jose | | sjsu | 1 | www.sjsu.edu My tbl schema... mysql> describe jos_universityTBL; +----------------+--------------+------+-----+---------+----------------+ | Field | Type | Null | Key | Default | Extra | +----------------+--------------+------+-----+---------+----------------+ | name | varchar(50) | NO | UNI | | | | repos_dir_name | varchar(50) | NO | | | | | city | varchar(20) | YES | | | | | stateVAL | varchar(5) | NO | | | | | address | varchar(50) | NO | | | | | abbrv | varchar(20) | NO | | | | | childtbl | varchar(200) | NO | | | | | userID | int(10) | NO | | 0 | | | ID | int(10) | NO | PRI | NULL | auto_increment | +----------------+--------------+------+-----+---------+----------------+ 9 rows in set (0.00 sec) mysql> describe jos_university_urlTBL; +--------------+--------------+------+-----+---------+----------------+ | Field | Type | Null | Key | Default | Extra | +--------------+--------------+------+-----+---------+----------------+ | universityID | int(10) | NO | | 0 | | | urltype | int(5) | NO | | 0 | | | url | varchar(200) | NO | MUL | | | | actionID | int(5) | YES | | 0 | | | status | int(5) | YES | | 0 | | | ID | int(10) | NO | PRI | NULL | auto_increment | +--------------+--------------+------+-----+---------+----------------+ 6 rows in set (0.00 sec) I'm really trying to get something like: |<<the concated urltype-url >>| ucs | losangeles | usc.edu | 1-u1 | 2-u2 | 3-u2 | Any pointers would be helpful!

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  • PHP MySQL Update query

    - by Jordan Pagaduan
    I have a website that has an update query. Example. Table name - myTable Table Content - id(AI) name -- myName age -- 13 image -- (no values) birthdate -- (no values) I only put values in name and age. In image and birthdate, I haven't put anything. If I edit it and update it and I don't put anything in name and in age, I only put values in image and in birthdate. The output is like this. (This ouput I wanted) Table name - myTable Table Content - id(AI) name -- myName age -- 13 image -- myImage.jpg birthdate -- Feb. 31, 2010 This is my code: <?php //mysql connect... //mysql select database... $sql = "UPDATE myTable SET name = '".$name."', age = '".$age."', image = '".$image."', birthdate"'$birthdate.."' WHERE id = $id"; mysql_query($sql); ?> I used this code but the output is: Table name - myTable Table Content - id(AI) name -- (no values) age -- (no values) image -- myImage.jpg birthdate -- Feb. 31, 2010 Feel free to ask if you don't understand my question Thank you

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  • Querying Networking Statistics: dlstat(1M)

    - by user12612042
    Oracle Solaris 11 took another big leap forward in networking technologies providing a reliable, secure and scalable infrastructure to meet the growing needs of today's datacenter implementations. Oracle Solaris 11 introduced a new and powerful network stack architecture, also known as Project Crossbow. From Solaris 11 onwards, we introduced a command line tool viz. dlstat(1M) to query network statistics. dlstat (for datalink statistics) is a statistics querying counterpart for dladm(1M) - the datalink administration tool. The tool is very easy to get started. Just type dlstat on a shell prompt on Solaris 11 (or later). For example,: # dlstat LINK IPKTS RBYTES OPKTS OBYTES net0 834.11K 145.91M 575.19K 104.24M net1 7.87K 2.04M 0 0 In this example, the system has two datalinks net0 and net1. The output columns denote input packets/bytes as well as output packets/bytes. The numbers are abbreviated in xxx.xxUnit format. However, one could get the actual counts by simply running dlstat -u R (R for raw): # dlstat -u R LINK IPKTS RBYTES OPKTS OBYTES net0 834271 145931244 575246 104242934 net1 7869 2036958 0 0 In addition, dlstat also supports various subcommands dlstat help The following subcommands are supported: Stats : show-aggr show-ether show-link show-phys show-bridge For more info, run: dlstat help {default|} I will only describe couple of interesting subcommands/options here. For a comprehensive description of all the dlstat subcommands refer dlstat's official manual . For NICs that support multiple rings (e.g. ixgbe), dlstat show-phys -r allows us to query per Rx ring statistics. For example: dlstat show-phys -r net4 LINK TYPE INDEX IPKTS RBYTES net4 rx 0 0 0 net4 rx 1 0 0 net4 rx 2 0 0 net4 rx 3 0 0 net4 rx 4 0 0 net4 rx 5 0 0 net4 rx 6 0 0 net4 rx 7 0 0 In this case, net4 is just a vanity name for an ixgbe datalink. This view is especially useful if one wants to look at the network traffic spread across all the available rings. Furthermore, any of the dlstat commands could be run with -i option to periodically query and display stats. For example, running dlstat show-phys -r net4 -i 5 will emit per Rx ring stats every 5 seconds. This is especially useful while analyzing a live system. Similarly, dlstat show-phys -t could be used to query per Tx ring stats. -r and -t could also be combined as dlstat show-phys -rt to query both Rx as well as Tx stats at the same time. Finally, there is also a quick way to dump ALL the stats. Just run dlstat -A. You probably want to redirect this output to a file because you are going to get a whole load of stats :-).

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  • mysql never releases memory

    - by Ishu
    I have a production server clocking about 4 million page views per month. The server has got 8GB of RAM and mysql acts as a database. I am facing problems in handling mysql to take this load. I need to restart mysql twice a day to handle this thing. The problem with mysql is that it starts with some particular occupation, the memory consumed by mysql keeps on increasing untill it reaches the maximum it can consume and then mysql stops responding slowly or does not respond at all, which freezes the server. All my tables are indexed properly and there are no long queries. I need some one to help on how to go about debugging what to do here. All my tables are myisam. I have tried configuring the parameters key_buffer etc but to no rescue. Any sort of help is greatly appreciated. Here are some parameters which may help. mysql --version mysql Ver 14.12 Distrib 5.0.77, for redhat-linux-gnu (i686) using readline 5.1 mysql> show variables; +---------------------------------+------------------------------------------------------------+ | Variable_name | Value | +---------------------------------+------------------------------------------------------------+ | auto_increment_increment | 1 | | auto_increment_offset | 1 | | automatic_sp_privileges | ON | | back_log | 50 | | basedir | /usr/ | | bdb_cache_size | 8384512 | | bdb_home | /var/lib/mysql/ | | bdb_log_buffer_size | 262144 | | bdb_logdir | | | bdb_max_lock | 10000 | | bdb_shared_data | OFF | | bdb_tmpdir | /tmp/ | | binlog_cache_size | 32768 | | bulk_insert_buffer_size | 8388608 | | character_set_client | latin1 | | character_set_connection | latin1 | | character_set_database | latin1 | | character_set_filesystem | binary | | character_set_results | latin1 | | character_set_server | latin1 | | character_set_system | utf8 | | character_sets_dir | /usr/share/mysql/charsets/ | | collation_connection | latin1_swedish_ci | | collation_database | latin1_swedish_ci | | collation_server | latin1_swedish_ci | | completion_type | 0 | | concurrent_insert | 1 | | connect_timeout | 10 | | datadir | /var/lib/mysql/ | | date_format | %Y-%m-%d | | datetime_format | %Y-%m-%d %H:%i:%s | | default_week_format | 0 | | delay_key_write | ON | | delayed_insert_limit | 100 | | delayed_insert_timeout | 300 | | delayed_queue_size | 1000 | | div_precision_increment | 4 | | keep_files_on_create | OFF | | engine_condition_pushdown | OFF | | expire_logs_days | 0 | | flush | OFF | | flush_time | 0 | | ft_boolean_syntax | + -><()~*:""&| | | ft_max_word_len | 84 | | ft_min_word_len | 4 | | ft_query_expansion_limit | 20 | | ft_stopword_file | (built-in) | | group_concat_max_len | 1024 | | have_archive | NO | | have_bdb | YES | | have_blackhole_engine | NO | | have_compress | YES | | have_crypt | YES | | have_csv | NO | | have_dynamic_loading | YES | | have_example_engine | NO | | have_federated_engine | NO | | have_geometry | YES | | have_innodb | YES | | have_isam | NO | | have_merge_engine | YES | | have_ndbcluster | NO | | have_openssl | DISABLED | | have_ssl | DISABLED | | have_query_cache | YES | | have_raid | NO | | have_rtree_keys | YES | | have_symlink | YES | | | init_connect | | | init_file | | | init_slave | | | interactive_timeout | 28800 | | join_buffer_size | 131072 | | key_buffer_size | 2621440000 | | key_cache_age_threshold | 300 | | key_cache_block_size | 1024 | | key_cache_division_limit | 100 | | language | /usr/share/mysql/english/ | | large_files_support | ON | | large_page_size | 0 | | large_pages | OFF | | lc_time_names | en_US | | license | GPL | | local_infile | ON | | locked_in_memory | OFF | | log | OFF | | log_bin | ON | | log_bin_trust_function_creators | OFF | | log_error | | | log_queries_not_using_indexes | OFF | | log_slave_updates | OFF | | log_slow_queries | ON | | log_warnings | 1 | | long_query_time | 8 | | low_priority_updates | OFF | | lower_case_file_system | OFF | | lower_case_table_names | 0 | | max_allowed_packet | 8388608 | | max_binlog_cache_size | 4294963200 | | max_binlog_size | 1073741824 | | max_connect_errors | 10 | | max_connections | 400 | | max_delayed_threads | 20 | | max_error_count | 64 | | max_heap_table_size | 16777216 | | max_insert_delayed_threads | 20 | | max_join_size | 4294967295 | | max_length_for_sort_data | 1024 | | max_prepared_stmt_count | 16382 | | max_relay_log_size | 0 | | max_seeks_for_key | 4294967295 | | max_sort_length | 1024 | | max_sp_recursion_depth | 0 | | max_tmp_tables | 32 | | max_user_connections | 0 | | max_write_lock_count | 4294967295 | | multi_range_count | 256 | | myisam_data_pointer_size | 6 | | myisam_max_sort_file_size | 2146435072 | | myisam_recover_options | OFF | | myisam_repair_threads | 1 | | myisam_sort_buffer_size | 16777216 | | myisam_stats_method | nulls_unequal | | net_buffer_length | 16384 | | net_read_timeout | 30 | | net_retry_count | 10 | | net_write_timeout | 60 | | new | OFF | | old_passwords | OFF | | open_files_limit | 2000 | | optimizer_prune_level | 1 | | optimizer_search_depth | 62 | | pid_file | /var/run/mysqld/mysqld.pid | | plugin_dir | | | port | 3306 | | preload_buffer_size | 32768 | | profiling | OFF | | profiling_history_size | 15 | | protocol_version | 10 | | query_alloc_block_size | 8192 | | query_cache_limit | 1048576 | | query_cache_min_res_unit | 4096 | | query_cache_size | 134217728 | | query_cache_type | ON | | query_cache_wlock_invalidate | OFF | | query_prealloc_size | 8192 | | range_alloc_block_size | 4096 | | read_buffer_size | 2097152 | | read_only | OFF | | read_rnd_buffer_size | 8388608 | | relay_log | | | relay_log_index | | | relay_log_info_file | relay-log.info | | relay_log_purge | ON | | relay_log_space_limit | 0 | | rpl_recovery_rank | 0 | | secure_auth | OFF | | secure_file_priv | | | server_id | 1 | | skip_external_locking | ON | | skip_networking | OFF | | skip_show_database | OFF | | slave_compressed_protocol | OFF | | slave_load_tmpdir | /tmp/ | | slave_net_timeout | 3600 | | slave_skip_errors | OFF | | slave_transaction_retries | 10 | | slow_launch_time | 2 | | socket | /var/lib/mysql/mysql.sock | | sort_buffer_size | 2097152 | | sql_big_selects | ON | | sql_mode | | | sql_notes | ON | | sql_warnings | OFF | | ssl_ca | | | ssl_capath | | | ssl_cert | | | ssl_cipher | | | ssl_key | | | storage_engine | MyISAM | | sync_binlog | 0 | | sync_frm | ON | | system_time_zone | CST | | table_cache | 256 | | table_lock_wait_timeout | 50 | | table_type | MyISAM | | thread_cache_size | 8 | | thread_stack | 196608 | | time_format | %H:%i:%s | | time_zone | SYSTEM | | timed_mutexes | OFF | | tmp_table_size | 33554432 | | tmpdir | /tmp/ | | transaction_alloc_block_size | 8192 | | transaction_prealloc_size | 4096 | | tx_isolation | REPEATABLE-READ | | updatable_views_with_limit | YES | | version | 5.0.77-log | | version_bdb | Sleepycat Software: Berkeley DB 4.1.24: (January 29, 2009) | | version_comment | Source distribution | | version_compile_machine | i686 | | version_compile_os | redhat-linux-gnu | | wait_timeout | 28800 | +---------------------------------+------------------------------------------------------------+

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  • SQL query to count and list the different counties per zip code

    - by Chris
    I have a sql server 2005 table called ZipCode, which has all the US ZIPs in it. For each entry, it lists the zip, county, city, state, and several other details. Some zipcodes span multiple cities and some even span multiple counties. As a result, some zipcodes appear many times in the table. I am trying to query the table to see which zipcodes go across multiple counties. This is what I have so far: select zipcode, count(zipcode) as total, county, state from zipcode group by zipcode, county, state order by zipcode Of 19248 records in the result set, here are the first several records returned: zipcode total county state 00501 2 SUFFOLK NY 00544 2 SUFFOLK NY 00801 3 SAINT THOMAS VI 00802 3 SAINT THOMAS VI 00803 3 SAINT THOMAS VI 00804 3 SAINT THOMAS VI 00805 1 SAINT THOMAS VI 00820 2 SAINT CROIX VI 00821 1 SAINT CROIX VI 00822 1 SAINT CROIX VI 00823 2 SAINT CROIX VI 00824 2 SAINT CROIX VI In this particular example, each zip with a total of two or more happens to be in the table more than once, and it's because the "cityaliasname" (not shown) or some other column differs. But I just want to know which zips are in there more than once because the county column differs. I searched before posting this and I found many questions about counting records but I could not figure out how to apply them to my problem. Please forgive me if there is already a question whose answer applies to this question.

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  • Querying for names

    - by Sai
    I have a table (say "Demographics") on SQL Server. In this table are the following columns "LastName", "FirstName", "MiddleName", "Prefix" , "Suffix". I have one textbox to search for them on a webpage. My question: Whats a good design strategy for queries where the user could be searching for various combinations of names including last names that have spaces e.g. "Smith James Jr." . Our customers store Jr. sometimes in suffix and sometimes just tack it to lastname. Sometimes Smith James Jr could be the entire last name.

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  • Cake bake undefined function mysql_query on easyphp

    - by fabbrillo
    Hi, when i try to use the shell to build models cake bake M i get this error: Fatal error: Call to undefined function mysql_query() in C:\Program Files\EasyPH P-5.3.2\www\cake\cake\libs\model\datasources\dbo\dbo_mysql.php on line 588 on phpinfo(); mysql extension is enabled, i'm using mysql driver running if(!function_exists('mysql_query')) echo 'error'; else echo 'all fine'; on a separate file prints all fine but on dbo_mysql.php just before line 588 prints error i believe the database configuration is correct as on http://127.0.0.1/cake/ it says Your database configuration file is present. and Cake is able to connect to the database. i'm using the latest stable version of cakephp and easyphp on windows xp pro sp3, paths are setted correctly any idea? thank you

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  • Entity Framework query not returning correctly enumerated results.

    - by SkippyFire
    I have this really strange problem where my entity framework query isn't enumerating correctly. The SQL Server table I'm using has a table with a Sku field, and the column is "distinct". It isn't a key, but it doesn't contain any duplicate values. Using actual SQL with where, distinct and group by cluases I have confirmed this. However, when I do this: // Not good foreach(var product in dc.Products) or // Not good foreach(var product in dc.Products.ToList()) or // Not good foreach(var product in dc.Products.OrderBy(p => p.Sku)) the first two objects that are returned ARE THE SAME!!! The third item was technically the second item in the table, but then the fourth item was the first row from the table again!!! The only solution I have found is to use the Distinct extension method, which shouldn't really do anything in this situation: // Good foreach(var product in dc.Products.ToList().Distinct()) Another weird thing about this is that the count of the resulting queries is the same!!! So whether or not the resulting enumerable has the correct results or duplicates, I always get the number of rows in the actual table! (No I don't have a limit clause anywhere). What could possibly cause this!?!?!?

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  • How does mysql define DISTINCT() in reference documentation

    - by goran
    EDIT: This question is about finding definitive reference to MySQL syntax on SELECT modifying keywords and functions. /EDIT AFAIK SQL defines two uses of DISTINCT keywords - SELECT DISTINCT field... and SELECT COUNT(DISTINCT field) ... However in one of web applications that I administer I've noticed performance issues on queries like SELECT DISTINCT(field1), field2, field3 ... DISTINCT() on a single column makes no sense and I am almost sure it is interpreted as SELECT DISTINCT field1, field2, field3 ... but how can I prove this? I've searched mysql site for a reference on this particular syntax, but could not find any. Does anyone have a link to definition of DISTINCT() in mysql or knows about other authoritative source on this? Best EDIT After asking the same question on mysql forums I learned that while parsing the SQL mysql does not care about whitespace between functions and column names (but I am still missing a reference). As it seems you can have whitespace between functions and the parenthesis SELECT LEFT (field1,1), field2... and get mysql to understand it as SELECT LEFT(field,1) Similarly SELECT DISTINCT(field1), field2... seems to get decomposed to SELECT DISTINCT (field1), field2... and then DISTINCT is taken not as some undefined (or undocumented) function, but as SELECT modifying keyword and the parenthesis around field1 are evaluated as if they were part of field expression. It would be great if someone would have a pointer to documentation where it is stated that the whitespace between functions and parenthesis is not significant or to provide links to apropriate MySQL forums, mailing lists where I could raise a question to put this into reference. EDIT I have found a reference to server option IGNORE SPACE. It states that "The IGNORE SPACE SQL mode can be used to modify how the parser treats function names that are whitespace-sensitive", later on it states that recent versions of mysql have reduced this number from 200 to 30. One of the remaining 30 is COUNT for example. With IGNORE SPACE enabled both SELECT COUNT(*) FROM mytable; SELECT COUNT (*) FROM mytable; are legal. So if this is an exception, I am left to conclude that normally functions ignore space by default. If functions ignore space by default then if the context is ambiguous, such as for the first function on a first item of the select expression, then they are not distinguishable from keywords and the error can not be thrown and MySQL must accept them as keywords. Still, my conclusions feel like they have lot of assumptions, I would still be grateful and accept any pointers to see where to follow up on this.

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  • Most commonly occurring string in mysql column.

    - by MILESMIBALERR
    I am making a website where users can vote on which category a page is. They can vote that the page is category, for example: a, b, c, or d. Please don't ask what I am using this for, it is not important, I just want to know how to do it. I need to find the most commonly occurring category in the mysql row out of all the votes. Each time a user submits their vote, it submits the "category" that they voted for, and the "page_id". I have this so far: select page_id, category from categories group by page_id You cannot simply use a "COUNT(*) where category = 'a'" then repeat it for each category because there is many more categories in the actual project.

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  • WMIprvse process leaks memory on 2008 server R2

    - by Dani Fischer
    I have a Windows 2008 R2 server running on a VM machine. My .NET service is running on this server periodically querying WMI, for example: SELECT ProcessId FROM Win32_Service WHERE ... After a day or two WMIprvse takes up to 500M memory and WMI queries start getting out of memory exceptions. This article seems to be talking about this issue: "http://support.microsoft.com/kb/958124" I've seen other articles saying that Microsoft is aware of the problem and not going to issue a fix until the next major release. http://social.msdn.microsoft.com/Forums/en/netfxbcl/thread/256eb40c-d050-4278-a3d8-863e30db02a0 I'd appreciate any suggestions and insights on this.

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  • OleDBDataAdapter UNPIVOT Query not working with Microsoft.ACE.OLEDB.12.0 DataSource

    - by JayT
    I am reading in an excel file with an OleDBDataAdapter. I am using a select statement to UNPIVOT the data and insert into DataSet. However, the compiler is genereating this error: {"Syntax error in FROM clause."} But the SQL Statement is correct as I have used it in other DB's Here is the code: string strConn = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + FileName + ";Extended Properties=\"Excel 12.0 Xml;HDR=" + HDR + ";IMEX=1\""; OleDbConnection conn = new OleDbConnection(strConn); conn.Open(); string SQL = "select Packhouse, Rm, Quantity , Product " + " FROM " + " ( " + " SELECT Date,Packhouse, Rm,[FG XL], [FG L] " + " FROM [" + xlSheet + "] " + " ) Main " + " UNPIVOT " + " ( " + " Quantity FOR Product in ([FG XL], [FG L]) " + " ) Sub " + " WHERE (Date = '2010/03/08') and Quantity <> '0' and Packhouse = 'A' and Rm = '1' "; OleDbDataAdapter adapter = new OleDbDataAdapter(); adapter.SelectCommand = new OleDbCommand(SQL, conn); ds[sequencecounter] = new DataSet(); adapter.Fill(ds[sequencecounter], xlSheet); If I copy and paste the excel data into a DB, then the select query works, but the data presented to me is in excel spreadsheets. If anyone could provide help on this it will be much appreciated. Regards, J

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  • Row Number for group by ?

    - by Damien Joe
    I have table structure like Category EmpName 1 Harry 1 John 1 Ford 2 James 2 Mark 2 Shane 3 Oliver 3 Ted I want results like Category EmpName RowNumber 1 Harry 1 1 John 2 1 Ford 3 2 James 1 2 Mark 2 2 Shane 3 3 Oliver 1 3 Ted 2 I am using db2 and row_number() is not working for different groups of records.

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  • iPhone SDK mySQL

    - by Kevin
    Hello everybody, I'm starting on a new iPhone project, and this application mostly relies on mySQL. I have a mysql database running on my computer, and I need this application to send queries to the server to gain information. One example is creating and logging into an account. I have successfully done this on my windows vb.net application, but I know that objective c will be harder. This is basically getting text from the sql database and displaying it on the iPhone application. If someone could simply help me on that, I'll easily get started. So I hope that you guys help me out here :). Thanks Kevin

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  • PHP - Plus sign with GET query

    - by Nate Shoffner
    I have a PHP script that does basic encryption of a string through the method below: <?php $key = 'secretkey'; $string = $_GET['str']; if ($_GET['method'] == "decrypt") { $output = rtrim(mcrypt_decrypt(MCRYPT_RIJNDAEL_256, md5($key), base64_decode($string), MCRYPT_MODE_CBC, md5(md5($key))), "\0"); } if ($_GET['method'] == "encrypt") { $output= base64_encode(mcrypt_encrypt(MCRYPT_RIJNDAEL_256, md5($key), $string, MCRYPT_MODE_CBC, md5(md5($key)))); } echo $output; ?> An example of a URL to encrypt a string would look like this: Encrypt.php?method=encrypt&str=the quick fox Which would return this as the encrypted string: LCuT/ieVa6cl3/4VtzE+jd9QPT3kvHYYJFqG6tY3P0Q= Now to decrypt the string all you have to do is change the "method" query to "decrypt", like so: Encrypt.php?method=decrypt&str=LCuT/ieVa6cl3/4VtzE+jd9QPT3kvHYYJFqG6tY3P0Q= The only problem is that when that encrypted string is decrypted it returns this: ¬ƒ§rYV}̳5Äš·nßì(ñïX8Þ;b I have narrowed down the problem to the plus sign that is in the encrypted string. PHP's GET method seems to translate a plus sign into a blank space. I have searched this bug and found out that it has already been filed here. I have tried different methods listed on that page and others with no success. The closest I got is by using this: $fixedstring = str_replace(" ", "+", $string); and then using $fixedstring in the encryption methods, the problem is, upon decryption, all blank spaces are converted to plus signs. Any ideas?

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  • Integer in MySQL Subqueries in store procedure

    - by confiq
    I made simple procedure just to demonstrate CREATE PROCEDURE `demo`(demo_int int) BEGIN DECLARE minid INT; SELECT min(id) FROM (SELECT id FROM events LIMIT demo_int,9999999999999999) as hoo INTO minid; END$$ The problem is with demo_int, if i change it to LIMIT 1,9999999999999999 it works but LIMIT demo_int,9999999999999999 Does not... It gives error You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'demo_int,9999999999999999) as hoo INTO minid; END' at line 4 (errno: 1064) Any clues?

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  • Calling methods or functions with Jquery

    - by Ross
    So I can call a php page using jquery $.ajax({ type: "GET", url: "refresh_news_image.php", data: "name=" + name, success: function(html) { alert(html) $('div.imageHolder').html(html); } }); However this getting a bit messy, I have a few .php files that only really preform very simple tasks. If I want to call a method $images-refresh_image(); is this possible. Failing that I could just create a big file with lots of functions in it? Thanks, Ross

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  • self join- how to use the aggregate functions

    - by Ranjana
    self join- how to use the aggregate functions select a.tablename, b.TableName,b.UserName from Employee a inner join Employee b on a.ColumnValue=b.ColumnValue and and a.TableName <> b.TableName and a.UserName=b.UserName and also to check whether the same user has count of records i.e Employee a = count of records of Employee b. how to add count function over here

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