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• tricky SQL when joining

  - by Erik

  I've two tables, shows and objects. I want to print out the latest objects, and the shownames for them. Right now I'm doing it this way: SELECT MAX(objects.id) as max_id, shows.name, shows.id FROM shows, objects WHERE shows.id = objects.showId GROUP BY shows.name however, if I also want to fetch the episode of the object I can't put it like SELECT object.episode [...], because then wont automatically select the object which is MAX(objects.id), so my question is how to do that? If you haven't already figured out my tables they're like this: Shows id name and also: Objects id name episode season showId Using MySQL. Thanks!

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• Meaning of tA tC and tP

  - by Greg Wiley

  If this is a duplicate I appoligize, but looking for two-letter strings is quite hard in any search. I'm looking for the meaning of tA tC and tP in the context of a mysql query. And in the spirit of "teaching a man how to fish" it would be great if you could point me in the right direction of where to find this info in the future. Edit: The Query $wpdb->get_row($wpdb->prepare("SELECT tA.* FROM ".AMYLITE_ADS." tA, ".AMYLITE_ADS_CAMPAIGNS." tC, ".AMYLITE_PACKAGES." tP WHERE tA.id=tC.ad_id AND tC.campaign_id=tP.campaign_id AND tP.zone_id=%d AND tP.date_end>CURDATE() GROUP BY tA.id ORDER BY RAND()", $zone->id));

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• SQL to get friends AND friends of friends of a user

  - by Enrique

  My MySQL tables structure is like this. USER int id varchar username FRIEND_LIST int user_id int friend_id For each friend relationship I insert 2 records in FRIEND_LIST. If user 1 is friend of user 2 then the next rows are inserted into FRIEND_LIST 1,2 2,1 I want to get the friends and friends of friends of an specific user. The select should return columns a, b, c. a: user_id b: friend_id c: username (username of friend_id ) If 1 is friend of 2 and 3. 2 is friend of 3, 4 and 5 3 is friend of 5,6,7 Then the query to get 1's friends and friends of friends should return: 1 2 two 1 3 three 2 1 one 2 3 three 2 4 four 2 5 five 3 1 one 3 5 five 3 6 six 3 7 seven Can I get this rows with a single query?

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• SQL query root parent child records

  - by Vish

  Hi, We have nested folders with parent-child relationship. We use MySQL MyISAM DB. The data is stored in the DB in the following manner. Every time a child folder is created in the nested structure, the previous parentID is added. I want to get the RootFolderID of a folder which is added in the hierarchy as tabulated below. FoldID ParentID |RootFolderID -----------------|------------------- 1 0 | 0 2 1 | 1 3 2 | 1 4 3 | 1 5 4 | 1 Please let me know how to get the root folderID and populate it in the RootFolderID column after a folder is created each time. Thanks.

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• How to approach this SQL query

  - by Kim

  I have data related as follows: A table of Houses A table of Boxes (with an FK back into Houses) A table of Things_in_boxes (with an FK back to Boxes) A table of Owners (with an FK back into Houses) In a nutshell, a House has many Boxes, and each Box has many Things in it. In addition, each House has many Owners. If I know two Owners (say Peter and Paul), how can I list all the Things that are in the Boxes that are in the Houses owned by these guys? Also, I'd like to master this SQL stuff. Can anyone recommend a good book/resource? (I'm using MySQL). Thanks!

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• C# mysqlreader on same connection error

  - by dominiquel

  Hi, I must find a way to do this in C#, if possible... I must loop on my folder list (mysql table), and for each folder I instanciate I must do another query, but when I do this it says : "There is already an open DataReader associated with this Connection" and I am inside a mysqlreader loop already. Note that I have oversimplified the code just to show you, the fact is that I must do queries inside a mysqlreader loop, and it looks to be impossible as they are on the same connection? MySqlConnection cnx = new MySqlConnection(connexionString); cnx.Open(); MySqlCommand command= new MySqlCommand("SELECT * FROM folder WHERE folder_id = " + id, cnx); MySqlDataReader reader= commande.ExecuteReader(); while (reader.Read()) { this.folderList[this.folderList.Length] = new CFolder(reader.GetInt32"folder_id"), cnx); } reader.Close(); cnx.Close();

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• Advanced search functionality

  - by Chris

  I have a website with a jQuery based autocomplete search functionality which works great. Currently though I have just one search box for all categories, what I want is for someone to be able to type in, say for example, dorian gray dvd (in any order) which will search for dorian gray within the dvd category. What this will require then is a bit of magic on the server side to figure out if any of the words are category keywords, and then limit the search by that. What is the best (and quickest) way to do this in PHP / MySQL? I currently have a few trains of thought Search the category table for matches and perhaps order the results by that. Or split up the search terms into an array and separately search the categories for that for a match. Another thought I just had is to concat the category title to the dvd title in the database and match against that, or something similar... but this sounds computationally expensive? Any advice?

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• Multiple LIKE in SQL

  - by ninumedia

  I wanted to search through multiple rows and obtain the row that contains a particular item. The table in mySQL is setup so each id has a unique list (comma-delimited) of values per row. Ex: id | order 1 | 1,3,8,19,34,2,38 2 | 4,7,2,190,38 Now if I wanted to pull the row that contained just the number 19 how would I go about doing this? The possibilities I could figure in the list with a LIKE condition would be: 19, ,19 ,19, I tried the following and I cannot obtain any results, Thank you for your help! SELECT * FROM categories WHERE order LIKE '19,%' OR '%,19%' OR '%,19%' LIMIT 0 , 30

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• How to join nearly identical several queries into one?

  - by Devyn

  Hi, Assume I have an order_dummy table where order_dummy_id, order_id, user_id, book_id, author_id are stored. You may complain the logic of my table but I somehow need to do it that way. I want to execute following queries. SELECT * FROM order_dummy WHERE order_id = 1 AND user_id = 1 AND book_id = 1 ORDER BY `order_dummy_id` DESC LIMIT 1 SELECT * FROM order_dummy WHERE order_id = 1 AND user_id = 1 AND book_id = 2 ORDER BY `order_dummy_id` DESC LIMIT 1 SELECT * FROM order_dummy WHERE order_id = 1 AND user_id = 1 AND book_id = 3 ORDER BY `order_dummy_id` DESC LIMIT 1 Please keep in mind that several numbers of same book is included in one order. Therefore, I list order_dummy_id by descending and limit 1 so only LATEST ORDER of A BOOK is shown. But my goal is to show other books in that way in one table. I used group by like this ... SELECT * FROM order_dummy WHERE order_id = 1 AND user_id = 1 GROUP BY book_id but it only shows order_dummy_id with ascending result. I have no idea anymore. Looking forward your kindness help!

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• INET_ATON() and INET_NTOA() in PHP?

  - by blerh

  I want to store IP addresses in my database, but I also need to use them throughout my application. I read about using INET_ATON() and INET_NTOA() in my MySQL queries to get a 32-bit unsigned integer out of an IP address, which is exactly what I want as it will make searching through the database faster than using char(15). The thing is, I can't find a function that does the same sort of thing in PHP. The only thing I came across is: http://php.net/manual/en/function.ip2long.php So I tested it: $ip = $_SERVER['REMOTE_ADDR']; echo ip2long($ip); And it outputs nothing. In the example they gave it seems to work, but then again I'm not exactly sure if ip2long() does the same thing as INET_ATON(). Does someone know a PHP function that will do this? Or even a completely new solution to storing an IP address in a database? Thanks.

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• Updating or inserting high scores in SQL

  - by Roger Gilbrat

  I've been racking my brain over this for the past few days and I'm not sure it's possible, but figured I ask here. Is it possible for a single SQL statement to update a high score if your score is greater or insert it if your first score? My Score table has a UserID, Level and Score columns and I like it to follow the following logic: If your new score is greater than your last score for this Level, then replace it. If you don't have a score for this Level then add it. If your score for this Level is less than your highest score for this Level then do nothing. Is this possible in a single SQL statement or do I have to use two, one to see if you have a new high score and if so, replace it? Each UserID would have only one score in the table for each Level. I'm using MySQL.

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• Why is it that I cannot insert this into Django correctly?

  - by alex

  new_thing = MyTable(last_updated=datetime.datetime.now()) new_thing.save() >>>>select * from MyTable\G; last_updated: 2010-04-01 05:26:21 However, in my Python console...this is what it says... >>> print datetime.datetime.now() 2010-04-01 10:26:21.643041 So obviously it's off by 5 hours. By the way, the database uses "SYSTEM" as its time, so they should match perfectly. mysql> SELECT current_time; +--------------+ | current_time | +--------------+ | 10:30:16 | +--------------+ >>> print datetime.datetime.now() 2010-04-01 10:30:17.793040

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• how to get current date and time in command line

  - by Ieyasu Sawada

  I am using mysqldump to backup mysql database. Now I just need to use the current date and time as file name for the generated sql file. How do I do that if my current code looks like this: mysqldump -u root -p --add-drop-table --create-options --password= onstor >c:\sql.sql I also found this code from this site, but I do not know how to incorporate it in my current code: @echo off For /f "tokens=2-4 delims=/ " %%a in ('date /t') do (set mydate=%%c-%%a-%%b) For /f "tokens=1-2 delims=/:" %%a in ('time /t') do (set mytime=%%a%%b) echo %mydate%_%mytime% Please help, thanks:)

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• Access Codeigniter database functions from file

  - by Manny Calavera

  Hello. I am using a SWFupload script and I can't make a request from flash with mod_rewrite, I don't know why... I just need to point the Flash request to that file directly. This file runs an upload script that works ok but now I need to save some info to the database and I would like to know what should I write to have access from that file that is not called from the controller and does not extend the model in order to run a mysql query. Thanks.

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• Creating a Variable of Present Date Minus a Past Timestamp

  - by John

  Hello, In the code below, "created" is a field in a MySQL table. This field is of the type "timestamp" and the default is set to "CURRENT_TIMESTAMP" of whenever a given row is created. In the query below, I would like to create a new variable that equals the present date minus the timestamp of "created", rounded off to units of days. I would like the present date to be whenever the query is run. How could I do this? Thanks in advance, John $sqlStr = "SELECT l.loginid, l.username, l.created, ...

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• Best way to gather, then import data into drupal?

  - by Frank

  I am building my first database driven website with Drupal and I have a few questions. I am currently populating a google docs excel spreadsheet with all of the data I want to eventually be able to query from the website (after it's imported). Is this the best way to start? If this is not the best way to start what would you recommend? My plan is to populate the spreadsheet then import it as a csv into the mysql db via the CCK Node. I've seen two ways to do this. http://drupal.org/node/133705 (importing data into CCK nodes) http://drupal.org/node/237574 (Inserting data using spreadsheet/csv instead of SQL insert statements) Basically my question(s) is what is the best way to gather, then import data into drupal? Thanks in advance for any help, suggestions.

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• HQL make query searching by date (Java+NetBeans)

  - by Zloy Smiertniy

  Hi all I have the following issue. I have a table of reserves in my MySQL DB, the date columns is defined DATETIME. I need to make a query using hibernate to find all reserves in one day no matter the hour, just that its the same year month and date, and I'm doing this public List<Reserve> bringAllResByDate(Date date){ em = emf.createEntityManager(); Query q = em.createQuery("SELECT r FROM Reserve r WHERE r.date=:date "); q.setParameter("date", date); ... I really dont know how to make it compare, and bring me just those from the specified date, any help??

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• Creating a video chat application for drupal site

  - by Dswabster

  I am trying to write an application for website powered by drupal, basically i would like to create an application only authenticated users are able to use, and users are only allowed to connect with members of the opposite group they are a member of. I have been learning flash builder 4 and learning the basics of actionscript but I am still pretty new to Flash and Flex development. I would like to users to connect using the Adobe Stratus 2 protocol and if possible by authentication on existing site and using membership data from existing mysql database. If anyone could give me a nudge in the right direction on how I should go about creating this application or the next steps i should take, it would be greatly appreciated.

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• Advantage to parsing Excel Spreadsheet data vs. CSV?

  - by john

  I have tabulated data in an Excel spreadsheet (file size will likely never be larger than 1 mb). I want to use PHP to parse the data and insert in to a MySQL database. Is there any advantage to keeping the file as an .xls/.xlsx and parsing it using a PHP Excel Parsing Library? If so, what are some good libraries to use? Obviuously, I can save the .xls/.xlsx as a CSV and handle the file that way. Thanks!

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• How can I sync a database driven website to a different server

  - by tbrandao

  I have a website using cPanel on a dedicated account, I would like to be able to automatically sync the website to a second hosting company or perhaps to a local (in house ) server. Basically this is a type of replication. The website is database driven (MySQL), so Ideally it would sync everything (content, database, emails etc.) , but most importantly is syncing the website files and its database. I'm not so much looking for a fail-over solution as an automatic replication solution, so if the primary site (Server) goes off-line, I can manually bring up the replicated site quickly. I'm familiar with tools like unison and rsync, but most of these only sync file(s) and do not do too well with open database connections.

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• How to design this simple database?

  - by Vafello

  I have 2 tables - one storing user information (id, username, password) and the second one storing information about events (id, name, description, date, username(represents the user who created the event)). I would like to implement 'favourite events' functionality. This would allow the user to store his favourite events and later display them in a list. I am not sure how to implement this in terms of design. I need a simple solution. Something like storing the IDs of favourite events in a field in the user table. I am using mysql and php. Can anyone point me to the right direction?

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• how do i update database using ADODB.Recordset?

  - by every_answer_gets_a_point

  i am using excel to connect to a mysql database: Dim dpath, atime, rtime, lcalib, aname, rname, bstate, instrument As String Dim rs As ADODB.Recordset Set rs = New ADODB.Recordset ConnectDB With wsBooks rs.Open "batchinfo", oConn, adOpenKeyset, adLockOptimistic, adCmdTable Worksheets.Item("Report 1").Select dpath = Trim(Range("B2").Text) atime = Trim(Range("B3").Text) rtime = Trim(Range("B4").Text) lcalib = Trim(Range("B5").Text) aname = Trim(Range("B6").Text) rname = Trim(Range("B7").Text) bstate = Trim(Range("B8").Text) ' instrument = GetInstrFromXML(wbBook.FullName) With rs .AddNew ' create a new record ' add values to each field in the record .Fields("datapath") = dpath .Fields("analysistime") = atime .Fields("reporttime") = rtime .Fields("lastcalib") = lcalib .Fields("analystname") = aname .Fields("reportname") = rname .Fields("batchstate") = "bstate" .Fields("instrument") = "NA" .Update ' stores the new record End With what is the next step? how do i do an rs.execute?

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• Sending variables in URLs in PHP with echo

  - by alexpelan

  Hi all, I can't really find good guidelines through google searches of the proper way to escape variables in URLs. Basically I am printing out a bunch of results from a mysql query in a table and I want one of the entries in each row to be a link to that result's page. I think this is easy, that I'm just missing a apostrophe or backslash somewhere, but I can't figure it out. Here's the line that's causing the error: echo "<a href = \"movies.php/?movie_id='$row['movie_id']'\"> Who Owns It? </a> "; and this is the error I'm getting: Parse error: syntax error, unexpected T_ENCAPSED_AND_WHITESPACE, expecting T_STRING or T_VARIABLE or T_NUM_STRING If you could elaborate in your answers about general guidelines for working with echo and variables in urls, that would be great. Thanks.

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• Eliminate subquery for average numeric value

  - by Dave Jarvis

  Quest A query selects locations that begin with Vancouver, which are in a 5 minute radius from one another. SQL Code The following SQL abomination does the trick: SELECT NAME FROM STATION WHERE DISTRICT_ID = '110' AND NAME LIKE 'Vancouver%' AND LATITUDE BETWEEN (SELECT round((min(LATITUDE) + max(LATITUDE)) / 2)-5 FROM STATION WHERE DISTRICT_ID = '110' AND NAME LIKE 'Vancouver%') and (SELECT round((min(LATITUDE) + max(LATITUDE)) / 2)+5 FROM STATION WHERE DISTRICT_ID = '110' AND NAME LIKE 'Vancouver%') AND LONGITUDE BETWEEN (SELECT round((min(LONGITUDE) + max(LONGITUDE)) / 2)-5 FROM STATION WHERE DISTRICT_ID = '110' AND NAME LIKE 'Vancouver%') and (SELECT round((min(LONGITUDE) + max(LONGITUDE)) / 2)+5 FROM STATION WHERE DISTRICT_ID = '110' AND NAME LIKE 'Vancouver%') ORDER BY LATITUDE Question How can this query be simplified to remove the redundancy, without using a view? Restrictions The database is MySQL, but ANSI SQL is always nice. Thank you!

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• Matching an IP address with an IP range?

  - by Legend

  I have a MySQL table setup as follows: +---------------+-------------+------+-----+---------+----------------+ | Field | Type | Null | Key | Default | Extra | +---------------+-------------+------+-----+---------+----------------+ | ipaddress_s | varchar(15) | YES | MUL | NULL | | | ipaddress_e | varchar(16) | YES | | NULL | | +---------------+-------------+------+-----+---------+----------------+ where, ipaddress_s and ipaddress_e look something like: 4.100.159.0-4.100.159.255 Now is there a way I can actually get the row that contains a given IP address? For instance, given the IP address: "4.100.159.5", I want the above row to be returned. So I am trying for a query that looks something like this (but of course this is wrong because in the following I am considering IPs as strings): SELECT * FROM ranges WHERE ipaddress_s<"4.100.159.5" AND ipaddress_e>"4.100.159.5" Any suggestions?

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