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• MySql Query to return number of photos in each album

  - by GivenPie

  MY table is set up like this, all I need to do is call a query to my Photos table. I have PhotoID as the primary key and GalleryID as the foreign key to Gallery. How can I could the number of unique PhotoID's for each multiple GalleryIDs. So to speak there are may duplicate GalleryIDs because there are many photos in a gallery. So I just need to could the number of unique PhotoIDs associated with that GalleryID. Can it be done in one query?

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• mysql database design: threads and replies

  - by ajsie

  in my forum i have threads and replies. one thread has multiple replies. but then, a reply can be a reply of an reply (like google wave). because of that a reply has to have a column "reply_id" so it can point to the parent reply. but then, the "top-level" replies (the replies directly under the thread) will have no parent reply. so how can i fix this? how should the columns be in the reply table (and thread table). at the moment it looks like this: threads: id title body replies: id thread_id (all replies will belong to a thread) reply_id (here lies the problem. the top-level replies wont have a parent reply) body what could a smart design look like to enable reply a reply?

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• Duplication in mysql/php

  - by user1334095

  I have a problem in the code.i have two tables 'sms' and 'bd_paid_bribe'.sms table has a column 'Message' and bd_paid_bribe table has a column 'c_addi_info'.when i execute the code first time all the values of Message column are inserted into c_addi_info column.when i enter a record for the second time instead of inserting the new record, all the records of Message column are inserted into bd_paid_bribe column.can u modify the code and provide a solution to avoid duplication and to insert only the newly added record. <?php $con=mysql_connect('localhost','root',''); if(!$con) { die("couldn't connect"); } mysql_select_db("ipab2",$con); $rs2=mysql_query(" select max(sms_index) from tab3"); do { $rs=mysql_query("insert into tab3(sms_index)select max(sms_index) from sms"); $rs3=mysql_query("SELECT max(sms_index) FROM sms"); $rs1=mysql_query("insert into bd_paid_bribe(c_addi_info) select Message from sms "); }while($rs2>$rs3); ?>

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• mysql_real_escape_string & slashes (again, oh yes)

  - by Fizzadar

  Righto, firstly magic quotes & runtime are disabled correctly in php.ini, and confirmed by phpinfo(). PHP version: 5.3.4 MySQL version: 5.1.52 I'm only use mysql_real_escape_string on the data, after htmlspecialchars and a trim, that's all the data cleaning on the variable. Yet, when I submit a single quote, the slash remains in the database. When running mysql_query I'm using "' . $var . '", although in the past this hasn't changed anything (could be due to the double quotes?). Any ideas? and please don't tell me about PDO/prepared statements, I'm aware of them and I have my reasons for doing it this way. Thanks!

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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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• Order mysql results without identifier

  - by Alex Crooks

  Usually I would have a table field called ID on auto increment. That way I could order using this field etc. However I have no control over the structure of a table, and wondered how to get the results in reverse order to default. I'm currently using $q = mysql_query("SELECT * FROM ServerChat LIMIT 15"); However like I said there is no field I can order on, so is there a way to tell mysql to reverse the order it gets the results? I.e last row to first row instead of the default.

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• Displaying a well formatted table

  - by user1378680

  Please take a look at the picture below. The header for the second column is displaying DISTRICT under SENATORIAL. But that's not the case for the 2nd and 3rd Rows under the 2nd Column. What I want to achieve is that words/strings should not ba able to extend width of the table.... The CSS I'm using is beneath. table { width: 650px; font-family: calibri; word-wrap: break-word; margin-left: 115px; } th { padding: 3px; color: white; text-transform: uppercase; font-size: 12px; background-image: url(navbg.png); font-weight: normal; word-wrap: break-word; font-family: "Trebuchet MS"; } Image:

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• Incrementing through mysql PHP

  - by Rawdon

  I am looking at try to increment and decrement by three records through a table and present those records. Say if the id '4' is currently active. I want the to be display the ID's and category of 3.2.1 and 5.6.7 from an increment and decrement So far I have: $stmt = $db->query("SELECT id, category FROM test"); $stmt->execute(); while ($results = $stmt->fetch(PDO::FETCH_ASSOC)) { $current = $results['id']; $category = $results['category']; $next = array(array('slide_no' => $current, 'category' => $category)); } print_r($next); Now with this, I am getting back every row in the table. I'm now getting confused on how I could increment and decrement the records by 3 and make sure that the category will also increment correctly. Thank you very much.

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• MySQL Multiple "AND" Query

  - by Mark J

  I have a table with 2 columns (see below). A member can have multiple responses to a question RESPONSES --------- member_id INT response_id INT SAMPLE DATA member_id -- response_id 1 -- 3 1 -- 5 2 -- 1 2 -- 5 2 -- 9 3 -- 1 3 -- 5 3 -- 6 What I need to do is query the table for member that meet ALL response criteria. For example I need to select all members that have a response_id of 1 AND 5. I am using the following query: SELECT DISTINCT member_id FROM responses WHERE response_id = 1 AND response_id = 5. I would expect to get back member_id's 2,3. However I am getting nothing returned. I used EXPLAIN and it shows there is an error in my where query. What am I doing wrong? Also, is there a function similar to IN where all the criteria must be met in order to return true? Thanks for your help.

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• Insert a row and avoiding race condition (PHP/MySQL)

  - by justkevin

  I'm working on a multiplayer game which has a lobby-like area where players select "sectors" to enter. The lobby gateway is powered by PHP, while actual gameplay is handled by one or more Java servers. The datastore is MySQL. The happy path: A player chooses a sector and tells the lobby he'd like to enter. The lobby checks whether this is okay, including checking whether there are too many players in the sector (compares the entry count in sector assignments for that sector against the sector's max_players value). The player is added to the sector_assignments table pairing him with the sector. The player client receives a passkey that will let him connect to the appropriate game server. The race condition: If two players request access to the same sector at close to same time, I can envision a case where they are both added because there was one space free when their check was started and max players gets exceeded. Is the best solution LOCK TABLE on sector_assignments? Is there another option?

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• PHP - Get value of imput box, without a form?

  - by Dodi300

  Hello. Does anyone know how I can get the value of an imput box, without having a form? I want a sumbit button, but instead of submiting a form, I want it to change data in a MySQL database. Something like this maybe? $img1="WHAT DO I PUT HERE?" $idx=1 $sql="INSERT INTO games SET img1='$img1' WHERE id=$idx"; $result=mysql_query($sql); Could I use that code on a "onclick" event? The imput box is named "img1". Thanks for the help!

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• Select multiple unique lines in MySQL

  - by MartinW

  Hi, I've got a table with the following columns: ID, sysid, x, y, z, timereceived ID is a unique number for each row. sysid is an ID number for a specific device (about 100 different of these) x, y and z is data received from the device. (totally random numbers) timereceived is a timestamp for when the data was received. I need a SQL query to show me the last inserted row for device a, device b, device c and so on. I've been playing around with a lot of different Select statements, but never got anything that works. I manage to get unique rows by using group by, but the rest of the information is random (or at least it feels very random). Anyone able to help me? There could be hundreds of thousands records in this table.

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• mySQL .NET API - Delete all data from table

  - by keynesiancross

  Hi all, I'm trying to figure out if there is an easy way to delete all the data in a table using the mySQL .NET API. The only slightly more tricky part to this is that in the C# code, the business logic can be run in both cases where there is, or isn't, data in teh table. So in some regards I almost need an If statement... Currently I am using the following code, but it doesn't seem to ever delete data... string deleteSQL = "DELETE FROM `data`.`currentData`"; MySqlCommand cmd2 = new MySqlCommand(deleteSQL, conn); Any thoughts would be much appreciated! Cheers

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• MySQL: Return grouped fields where the group is not empty, efficiently

  - by Ryan Badour

  In one statement I'm trying to group rows of one table by joining to another table. I want to only get grouped rows where their grouped result is not empty. Ex. Items and Categories SELECT Category.id FROM Item, Category WHERE Category.id = Item.categoryId GROUP BY Category.id HAVING COUNT(Item.id) > 0 The above query gives me the results that I want but this is slow, since it has to count all the rows grouped by Category.id. What's a more effecient way? I was trying to do a Group By LIMIT to only retrieve one row per group. But my attempts failed horribly. Any idea how I can do this? Thanks

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• Mysql SELECT and INSERT Error

  - by nepaliking

  I am using sort field in order to sort records. My code is this $query = "SELECT max(sort) FROM $this->table LIMIT 1;"; $result = mysql_query($query); $row = mysql_fetch_row($result); $sort = $row[0]+1; $query = "INSERT INTO "$this->table." VALUES ( '', '$ini', '$time', '$ip', '0', '$type', '$sort', '$title', '$image', '0' );"; $result = mysql_query($query) or die(mysql_error()); What is the error here?

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• MySQL: Select remaining rows

  - by Bjork24

  I've searched everywhere for this, but I can't seem to find a solution. Perhaps I'm using the wrong terms. Either way, I'm turning to good ol' trusty S.O. to help my find the answer. I have two tables, we'll call them 'tools' and 'installs' tools = id, name, version installs = id, tool_id, user_id The 'tools' table records available tools, which are then installed by a user and recorded in the 'installs' table. Selecting the installed tools are simple enough: SELECT tools.name FROM tools LEFT JOIN installs ON tools.id = installs.tool_id WHERE user_id = 99 ; How do I select the remaining tools -- the ones that have yet to be installed by user #99? I'm sorry if this is painfully obvious, but I just can't seem to figure it out! Thanks for the help!

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• correct mysql syntax error

  - by user2981651

  please could someone tell me the problem with this syntax because mysql 5.5.32 keeps tell me about an error CREATE TABLE `clients` ( `ID` tinyint(11) NOT NULL auto_increment, `title` varchar(10) NOT NULL default '', `firstName` varchar(30) NOT NULL default '', `lastName` varchar(30) NOT NULL default '', `address1` varchar(100) NOT NULL default '', `address2` varchar(100) NOT NULL default '', `town` varchar(100) NOT NULL default '', `province` varchar(100) NOT NULL default '', `country` varchar(40) NOT NULL default '', `postCode` varchar(20) NOT NULL default '', `telephone` varchar(20) NOT NULL default '', `email` varchar(100) NOT NULL default '', `cardNo` varchar(16) NOT NULL default '0000-00-00', `expiryDate` date NOT NULL default '0000-00-00', PRIMARY KEY (`ID`) ) TYPE=MyISAM COMMENT='customer table' AUTO_INCREMENT=1 ;

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• Adding graph in excel based on the content of ADFdi Table

  - by Arun

  Often we tend to represent the data present in the table in a graphical format to give a visual impression of the data. This article would be explaining the way to achieve it using the data we have in ADFdi table of the integrated workbook. Pre-requisites: Microsoft Office 2007 JDeveloper 11.1.1.1.0 and above Assuming we are already having an ADFdi enabled workbook with a table based on an Employee table as shown in the image below. Also, add the table.download to the ribbon toolbar as menu item / as action for the startup event. From excel, we'll add a new 3D bar chart Now, we need to select the data range for the chart. We will take an example of chart based on the salary of the employees. So, the data for the X-Axis of the chart would be the Ename and the data for the Y-Axis being the salary. We can do that by right clicking on the Chart and selecting Select Data. We would select the Legend Entry Series name as the Sal header column in the table, and for the data, we select both the header row and the row below it (by holding Shift key). And, for the Category Axis, we select the Ename header row and the row below it (by holding Shift key). We can get the chart now, by running the Workbook and downloading the data into the table. This simple example can be enhanced for complex graphs by using the data from the ADFdi table to use the power of excel along with ADF Desktop Integration.

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• Sql Server Prevent Saving Changes That Require Table to be Re-created

  When working with SQL Server Management studio, if you use the Design view of a table and attempt to make a change that will require the table to be dropped and re-added, you may receive an error message like this one: Saving changes is not permitted.  The changes you have made require the following tables to be dropped and re-created.  You have either made changes to a table that cant be re-created or enabled the option Prevent saving changes that require the table to be re-created. In truth, its quite likely that you didnt enable such an option, despite the error dialogs accusations, as it is enabled by default when you install SQL Management Studio.  You can learn more about the issue in the KB article, Error message when you try to save a table in SQL Server 2008: Saving changes is not permitted. Warning: As the above article states, it is not recommended that you turn off this option (at least not permanently), as it will ensure that you do not accidentally change the schema of a table such that data is lost.  Do so at your peril. The simplest way to bypass this error is to go into Option Designers and uncheck the option Prevent saving changes that require table re-creation.  See the screenshot below. The main reason why you will see this error is if you attempted to do any of the following to the table whose design you are saving: Change the Allow Nulls setting for a column Reorder columns Change any columns data type Add a new column The recommended workaround is to script out the changes to a SQL file and execute them by hand, or to simply write out your own T-SQL to make the changes. Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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• Getting the relational table data into XML recursively

  - by Tom

  I have levels of tables (Level1, Level2, Level3, ...) For simplicity, we'll say I have 3 levels. The rows in the higher level tables are parents of lower level table rows. The relationship does not skip levels however. E.g. Row1Level1 is parent of Row3Level2, Row2Level2 is parent of Row4Level3. Level(n-1)'s parent is always be in Level(n). Given these tables with data, I need to come up with a recursive function that generates an XML file to represent the relationship and the data. E.g. <data> <level levelid = 1 rowid=1> <level levelid = 2 rowid=3 /> </level> <level levelid = 2 rowid=2> <level levelid = 3 rowid=4 /> </level> </data> I would like help with coming up with a pseudo-code for this setup. This is what I have so far: XElement GetXMLData(Table table, string identifier, XElement data) { XElement xmlData = data; if (table != null) { foreach (row in the table) { // Get subordinate table Table subordinateTable = GetSubordinateTable(table); // Get the XML Data for the children of current row xmlData += GetXMLData(subordinateTable, row.Identifier, xmlData); } } return xmlData; }

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• Is this table replicated?

  - by fatherjack

  Another in the potentially quite sporadic series of I need to do ... but I cant find it on the internet. I have a table that I think might be involved in replication but I don't know which publication its in... We know the table name - 'MyTable' We have replication running on our server and its replicating our database, or part of it - 'MyDatabase'. We need to know if the table is replicated and if so which publication is going to need to be reviewed if we make changes to the table. How? USE MyDatabase GO /* Lots of info about our table but not much that's relevant to our current requirements*/ SELECT * FROM sysobjects WHERE NAME = 'MyTable' -- mmmm, getting there /* To quote BOL - "Contains one row for each merge article defined in the local database. This table is stored in the publication database.replication" interesting column is [pubid] */ SELECT * FROM dbo.sysmergearticles AS s WHERE NAME = 'MyTable' -- really close now /* the sysmergepublications table - Contains one row for each merge publication defined in the database. This table is stored in the publication and subscription databases. so this would be where we get the publication details */ SELECT * FROM dbo.sysmergepublications AS s WHERE s.pubid = '2876BBD8-3D4E-4ED8-88F3-581A659E8144' -- DONE IT. /* Combine the two tables above and we get the information we need */ SELECT s.[name] AS [Publication name] FROM dbo.sysmergepublications AS s INNER JOIN dbo.sysmergearticles AS s2 ON s.pubid = s2.pubid WHERE s2.NAME = 'MyTable' So I now know which

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• How to create repeatable table with unique ID's using jQuery

  - by milbert

  I need to create a table structure that can be "copied" and populated with a new set of data. However, each table must have unique IDs for functions that must access them later. For example: <table class="main"> <thead><tr><th class="header"></th></tr></thead> <tbody> <tr class="row"><td class="col0"></td><td class="col1"></td></tr> </tbody> </table> My current thought is to use jQuery to load the table from a seperate html file into a variable. Using this saved table I could then create a function that copies it, traverses the table to add an ID to each section where information will need to be appended from a seperate data source, and return this new table. I am new to jQuery and feel like I may be missing an easier/better way to accomplish this. Any help on this subject would be appreciated.

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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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• MySQL performance - 100Mb ethernet vs 1Gb ethernet

  - by Rob Penridge

  Hi All I've just started a new job and noticed that the analysts computers are connected to the network at 100Mbps. The ODBC queries we run against the MySQL server can easily return 500MB+ and it seems at times when the servers are under high load the DBAs kill low priority jobs as they are taking too long to run. My question is this... How much of this server time is spent executing the request, and how much time is spent returning the data to the client? Could the query speeds be improved by upgrading the network connections to 1Gbps? (Updated for the why): The database in question was built to accomodate reporting needs and contains massive amounts of data. We usually work with subsets of this data at a granular level in external applications such as SAS or Excel, hence the reason for the large amounts of data being transmitted. The queries are not poorly structured - they are very simple and the appropriate joins/indexes etc are being used. I've removed 'query' from the Title of the post as I realised this question is more to do with general MySQL performance rather than query related performance. I was kind of hoping that someone with a Gigabit connection may be able to actually quantify some results for me here by running a query that returns a decent amount of data, then they could limit their connection speed to 100Mb and rerun the same query. Hopefully this could be done in an environment where loads are reasonably stable so as not to skew the results. If ethernet speed can improve the situation I wanted some quantifiable results to help argue my case for upgrading the network connections. Thanks Rob

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• Lost connection to MySQL server during query

  - by Otavio

  I have a huge table and I need to process all rows in it. I'm always getting this Lost connection message and I'm not able to reconnect and restore the cursor to the last position it was. This is basically the code I have here: # import MySQLdb class DB: conn = None def connect(self): self.conn = MySQLdb.connect('hostname', 'user', '*****', 'some_table', cursorclass=MySQLdb.cursors.SSCursor) def query(self, sql): try: cursor = self.conn.cursor() cursor.execute(sql) except (AttributeError, MySQLdb.OperationalError): self.connect() cursor = self.conn.cursor() cursor.execute(sql) return cursor # # db = DB() sql = "SELECT bla FROM foo" data = db.query(sql) for row in data: do_something(row) # But I'm always getting this: # Traceback (most recent call last): File "teste.py", line 124, in <module> run() File "teste.py", line 109, in run for row in data: File "/usr/lib64/python2.5/site-packages/MySQLdb/cursors.py", line 417, in next row = self.fetchone() File "/usr/lib64/python2.5/site-packages/MySQLdb/cursors.py", line 388, in fetchone r = self._fetch_row(1) File "/usr/lib64/python2.5/site-packages/MySQLdb/cursors.py", line 285, in _fetch_row return self._result.fetch_row(size, self._fetch_type) _mysql_exceptions.OperationalError: (2013, 'Lost connection to MySQL server during query') Exception _mysql_exceptions.OperationalError: (2013, 'Lost connection to MySQL server during query') in <bound method SSCursor.__del__ of <MySQLdb.cursors.SSCursor object at 0x7f7e3c8da410>> ignored # Do you have any idea?

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