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• Create "INSERT" statements from mySQL database in Java

  - by girdus

  Does anyone know of any good libraries or scripts out there which will allow me to point to any mySQL table and automatically get a list of all the INSERT statements for the data in the table? DdlUtils allows me to create an XML file from a database model but I would like to have it in INSERT statements format and preferably the ability to choose a couple of tables instead of dumping the entire database. Thanks. EDIT: I need it to be a Java API because I want to programatically call it from my Java method.

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• Separating MySQL SELECT statement based on data in a column

  - by NightMICU

  Hi everyone, I need to retrieve data (vehicle details, in this case) from a MySQL table tabled and then loop through the results to generate separate lists for each category of vehicle. Is there a simple way to do this without having to have a SELECT statement for each type of vehicle? If I were just doing this for one category, I would use the following: <?php $sql = "SELECT * FROM apparatus WHERE vehicleType = 'Support'; $getSQL = mysql_query($sql); ?> <ul> <?php while ($vehicleData = mysql_fetch_assoc($getSQL)) {?> <li><?php echo $vehicleData['name'];?></li> <?php } ?> </ul> ..etc. Need to do this for four different types of vehicles. Thanks!

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• foreach invalid argument supplied and mysql fetch array issue

  - by La Myse

  i have this code which i use to print some fields from the database. My problem is that i get this error about foreach invalid argument supplied and a mysql fetch array problem. The code is this: foreach( $checked1 as $key => $value){ echo "<th> $value </th>"; } echo "</tr></thead>"; while($row = mysql_fetch_array($result)){ Where $checked1 is an array $checked1 = $_POST['checkbox']; What's the problem here? Thanks..

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• Error comparing hash to hashed mysql password (output values are equal)

  - by Charlie

  Im trying to compare a hashed password value in a mysql database with the hashed value of an inputted password from a login form. However, when I compare the two values it says they aren't equal. I removed the salt to simply, and then tested what the outputs were and got the same values $password1 = $_POST['password']; $hash = hash('sha256', $password1); ...connect to database, etc... $query = "SELECT * FROM users WHERE username = '$username1'"; $result = mysql_query($query); $userData = mysql_fetch_array($result); if($hash != $userData['password']) //incorrect password { echo $hash."|".$userData['password']; die(); } ...other code... Sample output: 7816ee6a140526f02289471d87a7c4f9602d55c38303a0ba62dcd747a1f50361| 7816ee6a140526f02289471d87a7c4f9602d55c38303a0ba62dcd747a1f50361 Any thoughts?

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• How to easily get the unmatched condition in mysql

  - by leivli

  I have a "server" table which has a column named 'SN' in mysql, when do query to retrive servers with some sns from 'sn1' to 'sn10000', we can: select * from server where sn in ('sn1','sn2','sn3',...'sn10000'); If there is only one sn in 'sn1'-'sn10000' which not exists in database, then the query above will retrive 9999 rows of result. The question is how can I easily get which one in 'sn1'-'sn10000' is not exists in database except the additional work, such as handling the result with shell script etc. I have an ugly sql like below can use: select * from (select 'sn1' as sn union select 'sn2' union select 'sn3' .... union select 'sn10000') as SN where not exists (select id from server where server.sn=SN.sn); Is Anyone has other better methods? Thanks.

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• MySQL Integer vs DateTime index

  - by David Kuridža

  Let me start by saying I have looked at many similar questions asked, but all of them relate to Timestamp and DateTime field type without indexing. At least that is my understanding. As we all know, there are certain advantages when it comes to DateTime. Putting them aside for a minute, and assuming table's engine is InnoDB with 10+ million records, which query would perform faster when criteria is based on: DateTime with index int with index In other words, it is better to store date and time as DateTime or UNIX timestamp in int? Keep in mind there is no need for any built-in MySQL functions to be used.

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• Ensuring uniqueness on a varchar greater than 255 in MYSQL/InnoDB

  - by Vijay Boyapati

  I have a table which contains HTML entries for news pages. When I initially designed it I used URL as the primary key. I've learned the error of my ways because left-joining is super slow. So I want to redesign the table with an integer (id) primary key, but still keep the rows unique based on the URL. The problem is that I've found URLs longer than 255 characters, and MySQL isn't letting my create a key on the URL. I'm using an InnoDB/UTF8 table. From what I understand it's using multiple bytes per character with a limit of 766 bytes for the key (in InnoDB). I would really love suggestions on an elegant way of keeping the rows unique based on URL, while using an integer primary key. Thanks!

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• Export XML with only one MySQL request ?

  - by mere-teresa

  I want to export in XML format some data from 7 tables (MySQL database), and then I want to import in another database. And I have a update or insert rule for data. I already have a SQL query retrieving all data, with JOINs on my 7 tables. But...when I try to put data in XML format, I reach a limit. My PHP loop can catch each row, but I would like to benefit from hierachical structure of the XML, and all I have are rows with the same data repeated. It is better to query once and to construct the XML tree in PHP or to query each time I want access to a lower level ?

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• Create a PHP cache system in MySQL database?

  - by Zach Smith

  I'm creating a web service that often scrapes data from remote web pages. After scraping this data, I have a simple multidimensional array of information to use. The scraping process is fairly taxing on my server, and the page load takes a while. I was considering adding a simple cache system using a MySQL database, where I create one row per remote web page with a the array of information pulled from it stored as a JSON encoded string. Is this a good enough system? Or would something like a text file per web page be a better idea?

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• MySQL COUNT help

  - by space

  I'm trying to count all the ids form table3 that are related to the first two tables but I think my SQL code is wrong can some one help me fix it? Here is the code: $dbc = mysqli_query($mysqli,"SELECT table1.*, table2.*, COUNT(id) as num, table3.id FROM table1 INNER JOIN table2 ON table1.id = table2.id INNER JOIN table3 ON table2.id = table3.id WHERE table2.id = '$id'"); Here is the error message. Mixing of GROUP columns (MIN(),MAX(),COUNT(),...) with no GROUP columns is illegal if there is no GROUP BY clause 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 '' at line 4

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• C# mysql one return last_insert_id

  - by Bernhard

  I am trying to create a method in which I can exequte mysql UPDATE, DELETE or INSERT query. The method must work when with an INSERT I ask or do not ask the last_insert_id(). Below is the code that I have at the moment: public int executeUID(MySqlCommand msCommand) { try { this.Open(); msCommand.Connection = this.msCon; return int.Parse(msCommand.ExecuteScalar().ToString()); } catch (MySqlException ex) { throw ex; } finally { this.Close(); } } The problem with this is is that when I use an insert query that returns a last_insert_id() the method works greatly. But when the query doesn't return an last_insert_id() the method malfunctions. How can I get this method to work?

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• mysql row counter

  - by David19801

  Hello, I have a mysql table. It has auto increment on the id. but I regularly delete rows so the numbers are all over the place. I need to get the last n rows out, but because of deletions, the common way of using the max of the autoincremented id column doesn't work well... 1 - Is their another way to get the bottom 50? 2 - Is their a way to get rows by actual row number? so if I have 4 rows labelled 1,2,3,4 delete row 2 then it will become 1,2,3 rather than 1,3,4?

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• mysql select multiple rows in join

  - by julio

  Hi-- I have a simple mySQL problem-- I have two tables, one is a user's table, and one is a photos table (each user can upload multiple photos). I'd like to write a query to join these tables, so I can pull all photos associated with a user (up to a certain limit). However, when I do something obvious like this: SELECT *.a, *.b FROM user_table a JOIN photos_table b ON a.id = b.userid it returns a.id, a.name, a.email, a.address, b.id, b.userid, b.photo_title, b.location but it only returns a single photo. Is there a way to return something like: a.id, a.name, a.email, a.address, b.id, b.userid, b.photo_title, b.location, b.id2, b.photo_title2, b.location2 etc. . . for a given LIMIT of photos? Thanks for any ideas.

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• Getting Null value with JSON from MySQL, how to retrive data from MySQL to JSON correctly?

  - by sky

  I'm using following code but cannot return data from MySQL. This is the output: <script type="text/javascript"> var somethings= [null,null,null]; </script> It does have three post, but I couldn't get the title(message) output. EDIT: this is the code I'm using: <?php $session = mysql_connect('localhost','name','pass'); mysql_select_db('dbname', $session); $result= mysql_query('SELECT * FROM posts', $session); $somethings= array(); while ($row= mysql_fetch_assoc($result)) { $somethings[]= $row['something']; } ?> <script type="text/javascript"> var somethings= <?php echo json_encode($somethings); ?>; </script> This is the table: message Try iPhone post! Welcome to Yo~ :) ??!

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• If statement in MySQL query with PHP

  - by user1104854

  Is it possible to use an if statement in a MySQL query in a similar what I'm showing? I want to grab some information for upcoming events(not ones with previous dates). ini_set('date.timezone', 'America/New_York'); $timestamp = date('m/d/Y'); $sql = "select eventID,eventTitle,eventDate from events where eventLocationID = $locationID ORDER BY eventDate DESC IF(eventDate > $timestamp) "; I really want to avoid doing post-query if statements that will only print if it's after today's date because I run it through a pagination function, and I'd really prefer to avoid tinkering with that.

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• MySQL Check if table exists error

  - by Max van Heiningen

  I'm trying to check if a table already exists, however I can't get this working. IF EXISTS (SELECT 1 FROM sysobjects WHERE xtype='u' AND name='tablename') SELECT 'table already exists.' ELSE BEGIN CREATE TABLE Week_( id INT(10)AUTO_INCREMENT PRIMARY KEY (id), ... ...) END; My error: #1064 - 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 'IF EXISTS (SELECT 1 FROM sysobjects WHERE xtype='u' AND name' at line 1 Can someone help me with this? Thanks in advance

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• MySQL Insert Query Randomly Takes a Long Time

  - by ShimmerTroll

  I am using MySQL to manage session data for my PHP application. When testing the app, it is usually very quick and responsive. However, seemingly randomly the response will stall before finally completing after a few seconds. I have narrowed the problem down to the session write query which looks something like this: INSERT INTO Session VALUES('lvg0p9peb1vd55tue9nvh460a7', '1275704013', '') ON DUPLICATE KEY UPDATE sessAccess='1275704013',sessData=''; The slow query log has this information: Query_time: 0.524446 Lock_time: 0.000046 Rows_sent: 0 Rows_examined: 0 This happens about 1 out of every 10 times. The query usually only takes ~0.0044 sec. The table is InnoDB with about 60 rows. sessId is the primary key with a BTREE index. Since this is accessed on every page view, it is clearly not an acceptable execution time. Why is this happening? Update: Table schema is: sessId:varchar(32), sessAccess:int(10), sessData:text

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• mysql query takes 145 seconds

  - by suomee

  I have a a mysql db with myisam engine. Along with many other table I have this table "et" which has around 8137037 records. I have created indexes (individual index of column hname and pnum, it did not help much later created joint index of hname and pnum and it help execute within a second)such that queries like "select st from et where hname='name' and pnum='1' limit 1;" execute fast (with in a second) but the problem is I must execute this query "select st from et where hname='name' and pnum='1' order by id limit 1" where id is the primary key of the table and this query sometimes take 145 seconds :( how can i resolve this issue?

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• MySQL Query Ranking

  - by eft0

  Hey there, I have this MySQL query for list a "Vote Ranking" for "Actions" and it work fine, but I want what the "id_user" doesn't repeat, like made a "DISTINCT" in this field. SELECT count(v.id) votos, v.id_action, a.id_user, a.id_user_to, a.action, a.descripcion FROM votes v, actions a WHERE v.id_action = a.id GROUP BY v.id_action ORDER BY votos DESC The result: votes act id_user 3 3 745059251 2 20 1245069513 2 23 1245069513 2 26 100000882722297 2 29 1245069513 2 44 1040560484 2 49 1257441644 2 50 1040560484 The expected result votes act id_user 3 3 745059251 2 20 1245069513 2 26 100000882722297 2 44 1040560484 2 49 1257441644 2 50 1040560484 Thanks in advanced!

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• PHP MySQL Insert Help

  - by user364333

  Hey I am trying to make a page that inserts some strings into a MySQL table but it just dosn't seem to be working for me. Here is the code I am using at the moment. <?php mysql_connect($address, $username, $password); @mysql_select_db($database) or die("Unable to select database"); $query = "insert INTO user (movieid, moviename)('" . $id . "','" . $name . "') or die(mysql_error())"; mysql_query($query); mysql_close(); ?> Where am i going wrong?

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• mysql NO_AUTO_VALUE_ON_ZERO problem

  - by every_answer_gets_a_point

  at least i think that is what the problem is. i am updating a mysql database through excel using an odbc like this: 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 besides the fields above, i also have a primary key auto_increment field called rowid for some reason the only field that gets updated is instrument. none of the other fields get updated.. however, when i try to do the same updating on a table that has no ROWID auto_increment field, it works perfectly has anyone else experienced this kind of issue before?

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• MySQL column names and aliases

  - by user329820

  hi, I have read that after select we use column-names but I have found a statement that was like this: SELECT 'A' FROM T WHERE A = NULL; would you lease help me? thanks (A is a column- name here?) my DBMS is MySQL EDITED : the exact question is this that: Will the above statement produce a row (select all that apply)? Notice that ANSI_NULLS is OFF. I want to know that the above statement will work? because some of you said that we should write IS NULL instead of =null

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• batch execute from mysql

  - by user3737088

  I need an interface for my web interface to bat files automatically temporarily to build and run. The contents of the file should come from a table in a MySQL database. It is so no matter what is in the table, the interface should run it. The web interface is based on the PHP version 5.5.6. Try and experiment After 3 months, I'm at the end and I have no ideas more. Has anyone an idea? Windows 2008 R2 IIS7 web server Full access EDIT: The batch files run through not only short. They sometimes run 1 week and longer.

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• wanted to get all dates in mysql result

  - by PankajK

  I have mysql table called user(id, name, join_on) join on is a date field what I want is to show in each day how many uses has been created I can use group by but it will only give me the dates when users get added like if date 4/12/10 5 users added 4/13/10 2 users added 4/15/10 7 users added here date 4/14/10 is missing and I want listing of all dates in one month. I have one solution for it by creating another table only for adding date and that table will left join my users table on join_on and will give total result but I don't want to do that as for creating that I need to create and add entries in date table please suggest the different approach for doing so. Thank you.

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• Delphi and mysql - Unable to connent to server..maybe custom connection reqd

  - by Steve

  I am coding an application for my company wherein i want to parse the results of a mysql query and display them in my application but i am facing a problem conecting to the database. the ip address of the server is : 172.30.192.20 and before i can ping it i have to add route on my pc something like this route add 172.30.192.0 mask 255.255.255.0 172.30.192.56 where 172.30.192.56 is the gateway Now whenever i try to connect 172.30.192.20 which is where the sql server is running my appplication instead connects to 172.30.192.56 i am coding the application in delphi and have used TmySQL After this didnt workout i tried an application called SQLwave. I just entered the server ip address and was able to connect to the database without any problems. it seems sqlwave uses mydac which is why even i tried using it but using the default connection options and setting i was still not able to connect. it seems sqlwave uses a custom connection using mydac i just want to know whats going wrong with my connection

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