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• T-SQL String Functions: difference between using Left/Right and Substring and strange behaviour

  - by TheObserver

  I am using SQL Server 2008 & 2005 (Express). I'm trying to extract part of an alpha numeric string from a varchar field. RIGHT(str_field,3) yields null values but substring(str_field, len(str_field)-2, len(str_field)) gives the right value. left(str_field,7) gives the expected values. What gives? I would have thought that RIGHT(str_field,3) and substring(str_field, len(str_field)-2, len(str_field)) are equivalent expressions.

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• Dynamic SQL to query an Adventureworks table

  - by salvationishere

  I am trying to see a list of tables from Adventureworks DB from "Person" schema in Sql Server 2008. I developed teh following SP, but after running it as follows it gives me error "Incorrect syntax near ')'". Do you know how I can revise this SP or exec statement? CREATE PROCEDURE [getTableNames] @SchemaName VARCHAR(50) AS BEGIN SET NOCOUNT ON; SET @SchemaName = 'PERSON' DECLARE @cmd AS VARCHAR(max) SET @SchemaName = RTRIM(@SchemaName) SET @cmd = N'SELECT TABLE_NAME ' + 'FROM information_schema.Tables ' + 'WHERE TABLE_TYPE = ''BASE TABLE'' AND TABLE_SCHEMA = @SchemaName' END exec sp_executesql getTableNames, N'@SchemaName NVARCHAR(50), @SchemaName'

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• Is there an equivalent of "OPTION(RECOMPILE)" or "WITH RECOMPILE" for an entire connection?

  - by kamens

  I'm curious. Is there any way to prevent SQL query execution plans from being cached for an entire connection's duration? Can I run a command that basically says, "use OPTION(RECOMPILE) for all subsequent commands until I tell you to stop doing so?" I'm acutely aware of all the performance trade-offs here, and I know this is not a step to be taken lightly. However, I'm in a unique situation where this behavior may be advantageous.

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• Microsoft SQL Count problem

  - by Matt

  Hey smarties. I'm having trouble with the following SQL statement. I know that I can't do a GROUP BY on the OnlineStatus column, and it makes sense because it's a function call, not an actual column in my table. How would I modify this so that I can get a count of how many users are online? SELECT CASE dbo.fnGetWebUserOnlineStatus(W.Id) WHEN 1 THEN 'Online' WHEN 2 THEN 'Ingame' ELSE 'Offline' END AS OnlineStatus FROM dbo.WebUsers W WHERE W.[Status]=1 GROUP BY OnlineStatus

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• Strip OLE header information (MS Access / SQL Server)

  - by crimson13

  I have a C++ application that needs to support binary database content (images, etc). When using MS Access or MS SQL Server this data is wrapped inside an OLE object. How do I strip this OLE header information? Note that I can't just look for the beginning of a specific tag as the content can be png, jpg and a whole heap of other formats. Should I use something like COleDataObject?

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• Grouping SQL results by continous time intervals (oracle sql)

  - by Kamil Zadora

  Hi I have following data in the table: ID-----startDate----endDate 5549 2008-05-01 4712-12-31 5567 2008-04-17 2008-04-30 1 5567 2008-05-01 2008-07-31 1 5567 2008-09-01 4712-12-31 2 5569 2008-05-01 2008-08-31 5569 2008-09-01 4712-12-31 5589 2008-04-18 2008-04-30 5589 2008-05-01 4712-12-31 5667 2008-05-01 4712-12-31 5828 2008-06-03 4712-12-31 5867 2008-06-03 4712-12-31 6167 2008-11-01 4712-12-31 6207 2008-07-01 4712-12-31 6228 2008-07-01 4712-12-31 6267 2008-07-14 4712-12-31 I am looking for I way to group the continuous time intervals for each id to return: ID, min(startDate), max(endDate), to have something like this in result for the bolded ID 5567 5567 2008-04-17 2008-07-31 5567 2008-09-01 4712-12-31 PL/SQL is also an option here :) Thanks,

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• Performance in SQL Mobile with one big column that's not being selected

  - by Anthony Mastrean

  I have a SQL Mobile database with one table. It has several columns with useful, often queried data and one column that stores a relatively large string per record (1000+ characters) that is not queried often. Imagine this fake schema, the "lifeStory" field is the large one. table1 String firstName String lastName String address String lifeStory A representative query would be SELECT firstName, lastName, address FROM table1 WHERE firstName = :p1 Does anyone know of any performance concerns leaving that large, infrequently queried column in this table?

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• Changing default logical filename in SQL 2005

  - by Andrew

  I have a issue about creating databases in SQL 2005. I want to be able to change the default logical filename for the mdf file. At the moment the log logical filename ends in _log by default. I want the data logical filename to automatically end with _data for consistency. Is there a way i can set this? Andrew

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• sql server modify error

  - by Jaspal

  hi, i m not able to modify table in SQL server. i m new to databases. use work go alter table employee modify id varchar(20) error message is- Msg 102, Level 15, State 1, Line 1 Incorrect syntax near 'modify' here is an screenshot thanks

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• Query to find the records from a table which are updated or added in the last one month ?

  - by kumar

  Hi, I want to select the records from a table which are updated or added in the last one month (table doesn’t have any datetime field and I can’t change the table structure). Is it possible to write a sql query for that? how to fetch those records from table regards, kumar

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• Is it possible to create a global stored procedure at Sql server level

  - by Shantanu Gupta

  I created a query that takes a database backup at certain specified location. I want to use it as a stored procedure but this should act as a global stored procedure so that whenever this SP is called. Then database backup is taken. It uses DB_Name() to take database backup of owner database. Is it possible to create any such SP or Function. I am using sql server 2005

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• How to order by column with non-null values first in sql

  - by devlife

  I need to write a sql statement to select all users ordered by lastname, firstname. This is the part I know how to do :) What I don't know how to do is to order by non-null values first. Right now I get this: null, null null, null p1Last, p1First p2Last, p2First etc I need to get: p1Last, p1First p2Last, p2First null, null null, null Any thoughts?

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• ASP.NET MVC with SQL Server backend returns old data when query is executed

  - by synergetic

  My ASP.NET MVC web app has a weird issue. In VS debugging mode it works as expected, but when I publish it to dedicated web server (windows 2003, IIS6) a sql query returns previous data even though underlying data was already updated through the same connection. It looks like as if a query returns cached data. What might be the problem?

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• How to return empty cells for repeated values and keep only the cells which are different ?

  - by Ashraf Bashir

  I have a query that selects some fields to display from a table SELECT Field1, Field2, Field3, Field4 FROM table1 I want instead of returning : To return: How could I modify my SQL statement to return the second figure ? Or at least how to change the gridview properties of .Net to do so (if this is possible) ?

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• Examples of SQL Injections through addslashes()?

  - by nute

  In PHP, I know that mysql_real_escape in much safer than using addslashes. However, I could not find an example of a situation where addslashes would let an SQL Injection happen. Can anyone give some examples? Thanks!

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• Modify xml element name in SQL Server

  - by sesame

  I want to change element name with following statement: SET @myDoc.modify('replace value of (/CustomerInfo)[1] with "Customer"') from <CustomerInfo>     <ID1</ID> </CustomerInfo> to <Customer>     <ID1</ID> </Customer> But failed. So how can i change it just in sql ?

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• synchronize ms access and mySQL in different host

  - by Margareth

  Hi, Would like to ask is there any way to synchronize Ms Access and mySQL but are hosted in different hosting. If I update the Ms Access, the mySQL database in different Host is updated automatically. Thank you.

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• Case Order by using Null

  - by molgan

  Hello I have the following test-code: CREATE TABLE #Foo (Foo int) INSERT INTO #Foo SELECT 4 INSERT INTO #Foo SELECT NULL INSERT INTO #Foo SELECT 2 INSERT INTO #Foo SELECT 5 INSERT INTO #Foo SELECT 1 SELECT * FROM #Foo ORDER BY CASE WHEN Foo IS NULL THEN Foo DESC ELSE Foo END DROP TABLE #Foo I'm trying to produce the following output: 1 2 3 4 5 NULL "If null then put it last" How is that done using Sql 2005 /M

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• SQL injection question

  - by Luke

  I have heard of sql injection, what is it and how do i stop it? Also is there anything else i should look out for ? Thanks

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• Creating a trigger that manipultes a field in SQL Server

  - by icemanind

  Guys, I have a table called tblNames and one of my fields in this table is called 'UpFileName'. Is it possible to create an insert trigger that would automatically replace all '%20' in the UpFileName field to underscores '_'? I'm using SQL Server 2005.

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• help translate this week query from Oracle PL/SQL to SQL Server 2008

  - by Sarah Vessels

  I have the following query that runs in my Oracle database and I want to have the equivalent for a SQL Server 2008 database: SELECT TRUNC( /* Midnight Sunday */ NEXT_DAY(SYSDATE, 'SUN') - (7*LEVEL) ) AS week_start, TRUNC( /* 23:59:59 Saturday */ NEXT_DAY(NEXT_DAY(SYSDATE, 'SUN') - (7*LEVEL), 'SAT') + 1 ) - (1/(60*24)) + (59/(60*60*24)) AS week_end FROM DUAL CONNECT BY LEVEL <= 4 /* Get the past 4 weeks */ What the query does is get the start of the week and the end of the week for the last 4 weeks. It generates data like the following: WEEK_START WEEK_END 2010-03-07 00:00:00 2010-03-13 23:59:59 2010-02-28 00:00:00 2010-03-06 23:59:59 ...

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• SQL Server 2005 red herring error "The user does not have permission to perform this action"

  - by Sylvia

  We're getting the error "The user does not have permission to perform this action" during times of heavy load (regularly, when a trim job occurs). The error clears up when the service accessing sql server is restarted, so it's obviously not a real permissions problems. What kind of situations could cause an error like this, when it's not really a permissions problem? Any ideas of good places to start looking? thanks for any insights...

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• Prevent SQL Server Table operations (INSERT and DELETE) on some tables

  - by stckvrflw

  While working with some random sql queries on our databases, we may not want to insert or delete items to some of the database tables by just typing their names by mistake. So how to make them locked to the "editing", to be able to work safe. Thanks.

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• Meaning of Primary Key to Microsoft SQL Server 2008

  - by usr

  What meaning does the concept of a primary key have to the database engine of SQL Server? I don't mean the clustered/nonclustered index created on the "ID" column, i mean the constraint object "primary key". Does it matter if it exists or not? Alternatives: alter table add primary key clustered alter table create clustered index Does it make a difference?

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• Translate SQL query to LINQ

  - by ile

  PhotoAlbums table AlbumID Title Date Photos table: PhotoID Title Date AlbumID SELECT AlbumID, Title, Date, (SELECT TOP (1) PhotoID FROM Photos AS c WHERE (AlbumID = a.AlbumID)) AS PhotoID FROM PhotoAlbums AS a I need this query written in LINQ-to-SQL. Thanks in advance

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