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• i want to insert values from table1 to table2 with incremantal value

  - by adnan

  i tried something like this but the id value is not changing, getting the value for first record and set the value for all rest... insert into table1 (Id,b,c,d) (select (select max(Id)+1 from table1),x,y,z from table2 where... )

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• How to set user environment variables in Windows Server 2008 R2 as a normal user?

  - by likm

  In older versions of Windows, it was just open the Control Panel, select the System applet, select the Advanced tab, and then hit the Environment variables button. As a normal user, you could edit the "User variables" but not the "System variables". In Windows Server 2008 R2, if I try to hit the Advanced System settings option in the System applet, it prompts for the Administrator password.

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• Efficient SQL to count an occurrence in the latest X rows

  - by pulegium

  For example I have: create table a (i int); Assume there are 10k rows. I want to count 0's in the last 20 rows. Something like: select count(*) from (select i from a limit 20) where i = 0; Is that possible to make it more efficient? Like a single SQL statement or something? PS. DB is SQLite3 if that matters at all...

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• What data actually gets cached in InnoDB/MySQL?

  - by ming yeow

  Hi folks, i am trying to optimize performance for my database. My question is - what get cached in the db memory? For example: (table with 2 columns: key (indexed), data (not indexed) updated (not indexed) Select * where updated=20100202 (the db will do a scan - will the scanned rows be kept in memory?) Select * where key = 20 (the db will refer to the index - will the identified rows be kept in memory?)

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• How do I test the speed of a mySQL query?

  - by Chris

  I have a select and query like below... $sql = "SELECT * FROM notifications WHERE to_id='".$userid."' AND (alert_read != '1' OR user_read != '1') ORDER BY alert_time DESC"; $result = mysql_query($sql); how do I test how long the query took to run?

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• SQL Server 2005: Why would a delete from a temp table hang forever?

  - by Dr. Zim

  DELETE FROM #tItem_ID WHERE #tItem_ID.Item_ID NOT IN (SELECT DISTINCT Item_ID FROM Item_Keyword JOIN Keyword ON Item_Keyword.Keyword_ID = Keyword.Record_ID WHERE Keyword LIKE @tmpKW) The Keyword is %macaroni%. Both temp tables are 3300 items long. The inner select executes in under a second. All strings are nvarchar(249). All IDs are int. Any ideas? I executed it (it's in a stored proc) for over 12 minutes without it finishing.

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• SQL OUTER JOIN with NEWID to generate random data for each row

  - by CL4NCY

  Hi, I want to generate some test data so for each row in a table I want to insert 10 random rows in another, see below: INSERT INTO CarFeatures (carID, featureID) SELECT C.ID, F.ID FROM dbo.Cars AS C OUTER APPLY ( SELECT TOP 10 ID FROM dbo.Features ORDER BY NEWID() ) AS F Only trouble is this returns the same values for each row. How do I order them randomly?

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• What does "foo" mean in SQL Server Query ?

  - by John

  for eg... SELECT * FROM ( SELECT RANK() OVER (ORDER BY stud_mark DESC) AS ranking, stud_id, stud_name, stud_mark FROM tbl_student ) AS foo WHERE ranking = 10 Here foo is present...actually what it does ?..

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• Can php query the results from a previous query?

  - by eaolson

  In some languages (ColdFusion comes to mind), you can run a query on the result set from a previous query. Is it possible to do something like that in php (with MySQL as the database)? I sort of want to do: $rs1 = do_query( "SELECT * FROM animals WHERE type = 'fish'" ); $rs2 = do_query( "SELECT * FROM rs1 WHERE name = 'trout'" );

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• Join with table and sub query in oracle

  - by Amandeep

  I dont understand what is wrong with this query it is giving me compile time error of command not ended properly.The inner query is giving me 4 records can any body help me out. select WGN3EVENTPARTICIPANT.EVENTUID from (Select WGN_V_ADDRESS_1.ADDRESSUID1 as add1, WGN_V_ADDRESS_1.ADDRESSUID2 as add2 from WGN3USER inner join WGN_V_ADDRESS_1 on WGN_V_ADDRESS_1.USERID=wgn3user.USERID where WGN3USER.USERNAME='FIRMWIDE\khuraj' ) as ta ,WGN3EVENTPARTICIPANT where (ta.ADDRESSUID1=WGN3EVENTPARTICIPANT.ADDRESSUID1) AND (ta.ADDRESSUID2=WGN3EVENTPARTICIPANT.ADDRESSUID2) I am running it in oracle. Thanks Amandeep

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• seperated mysql statement query in php

  - by stone

  So, I can run the following statements from within mysql itself successfully. SET @fname = 'point1'; SELECT * FROM country WHERE name=@fname;` But when I try to pass the query through php like this and run it, I get an error on the second line $query = "SET @fname = 'point1';"; $query .= "SELECT * FROM country WHERE name=@fname;";

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• Binary string search on one field.

  - by CrazyJoe

  I have 300 boolean fields in one table, and im trying to do somithing like that: One string field: 10000010000100100100100100010001 Ha a simple way to do a simple search os this field like: select * from table where field xor "10000010000100100100000000010001" Im tring this but is to long: select * from teste where mid(info,2,1) and mid(info,3,1) :) Help!!

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• MSSQL + Copy data from one server database table to the other

  - by lucky

  Hello All, I dont know how to copy table data from one server - database - table TO other sever - database - table. If it is with in the same server and different databases, i have used the following SELECT * INTO DB1..TBL1 FROM DB2..TBL1 (to copy with table structure and data) INSERT INTO DB1..TBL1(F1, F2) SELECT F1, F2 FROM DB2..TBL1 (copy only data) Now my question is copy the data from SERVER1 -- DB1-- TBL1 to SERVER2 -- DB2 --TBL2 Thanks in advance!

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• Is there a way to fix the length of drop down list?

  - by Harry Pham

  <select> <option>...</option> ... </select> Is there a way to fix the length of the drop down list.

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• SQLite3 and "cascade" SELECTion

  - by SK9

  I have a parent table and a child table related to the parent table by some REFERENCE. Suppose I exec a SELECT statement on the child and that it returns the at least one result. Can I arrange for my search to automatically yield all the content of all related parents with this child too? Or must I always take the reference from the child and put this in a second SELECT statement and exec this myself?

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• TSQL, Rename column of a returning table in user Function

  - by user1433660

  I have defined function which returns table with 2 columns. Can I rename these columns so that resulting table would be like: Press name | Sum of pages ? CREATE FUNCTION F_3 (@press nvarchar(255)) RETURNS @table TABLE ( Press nvarchar(255), PagesSum int ) AS BEGIN INSERT @table SELECT @press, SUM(Books.Pages) FROM Books, Press WHERE Press.Name = @press AND Books.Id_Press = Press.Id GROUP BY Press.Name RETURN END GO SELECT * FROM F_3('BHV') GO I've tried to do it like Press AS 'Press name' nvarchar(255) but that won't work.

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• How can I preform operations on rows in a Tabular form in MS access?

  - by Justin Tanner

  I have a Tabular type Form based upon a SELECT * FROM table type of query in MS access. I would like to: check / select rows in this form iterate through the checked / selected rows

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• [Django] How do I filter the choices in a ModelForm that has a CharField with the choices attribute

  - by nubela

  I understand I am able to filter queryset of Foreignkey or Many2ManyFields, however, how do I do that for a simple CharField that is a Select Widget (Select Tag). For example: PRODUCT_STATUS = ( ("unapproved", "Unapproved"), ("approved", "Listed"), #("Backorder","Backorder"), #("oos","Out of Stock"), #("preorder","Preorder"), ("userdisabled", "User Disabled"), ("disapproved", "Disapproved by admin"), ) and the Field: o_status = models.CharField(max_length=100, choices=PRODUCT_STATUS, verbose_name="Product Status", default="approved") Suppose I wish to limit it to just "approved" and "userdisabled" instead showing the full array (which is what I want to show in the admin), how do I do it? Thanks!

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• Difference between "and" and "where" in joins

  - by Midhat

  Whats the difference between SELECT DISTINCT field1 FROM table1 cd JOIN table2 ON cd.Company = table2.Name and table2.Id IN (2728) and SELECT DISTINCT field1 FROM table1 cd JOIN table2 ON cd.Company = table2.Name where table2.Id IN (2728) both return the same result and both have the same explain output

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• MySql: How to know if an entry is compressed or not

  - by Guy

  I'm working with python and mysql and I want to verify that a certain entry is compressed in the db. Ie: cur = db.getCursor() cur.execute('''select compressed_column from table where id=12345''') res = cur.fetchall() at this point I would like to verify that the entry is compressed (ie in order to work with the data you would have to use select uncompress(compressed_column)..). Ideas?

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• Question about Benchmark function in Mysql ( Incredible results ).

  - by xRobot

  I have 2 tables: author with 3 millions of rows. book with 20 miles rows. . So I have benchmarked this query with a join: SELECT BENCHMARK(100000000, 'SELECT book.title, author.name FROM `book` , `author` WHERE book.id = author.book_id ') And this is the result: Query took 0.7438 sec ONLY 0.7438 seconds for 100 millions of query with a join ??? Do I make some mistakes or this is the right result ?

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• Unknown Column In Where Clause

  - by Corpo

  I have a simple query: SELECT u_name AS user_name FROM users WHERE user_name = "john"; I get "Unknown Column 'user_name' in where clause". Can I not refer to 'user_name' in other parts of the statement even after select 'u_name as user_name'?

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• Getting random values in mySql query

  - by Roland

  I have a query which selects 6 names in the database. eg SELECT names FROM users LIMIT 6 Now I want this query to select a random 6 names in the database table, is this possible? And how

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• SQL Server - How Do I Substract 2 Hours from Formatted Time

  - by user1842653

  I need to know how to add 2 hours to the below 'Completed' timestamp. Here is the Select statement Select Tsk.task_id,Tsk.org_id,Tsk.completed,Tsk.assgn_acct_id,name FROM tdstelecom.tasks As Tsk WHERE Tsk.task_id = '11094836' AND DATE(Tsk.completed) < CURDATE() AND DATE(Tsk.completed) >= DATE_SUB(CURDATE (),INTERVAL 180 DAY) Here are the results: 2012-08-22 14:18:14 Desired results: 2012-08-22 16:18:14

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• MySQL: How to copy rows, but change a few fields?

  - by Andrew

  I have a large number of rows that I would like to copy, but I need to change one field. I can select the rows that I want to copy: select * from Table where Event_ID = "120" Now I want to copy all those rows and create new rows while setting the Event_ID to 155. How can I accomplish this?

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