Exec Or Sp_Executesql Performance

Sep 11, 2001

I need to do some dynamic execs based on SQL strings as variables taken from a table.

I need the best performance. In testing, I'm finding that the string I am executing is taking 20 times as long to run from within an Exec or sp_executesql vs running the same string from directly within query analyzer. Of course, there's some overehead with Exec, and we're talking milliseconds (30ms in query analyzer vs 600 in an Exec), but this still seems like a lot of overhead. I assume both statements still need to be compiled and an execution plan created. Is this difference in time normal?

I ask because I'm debating about whether to execute this process (which may need to run 9000 times a second) in a stored procedure or using an executable running separately on the server. I assume an executable's performance will approximate running the same query from query analyzer.

Here's the query:

Select GroupNodeNumber, SB.* From (Select Distinct GroupNodeNumber from #QASData) RD Cross Join (SELECT * From SQL_QAS_ServiceFailure WHERE QASEventID=99077223) SB Where (GroupNodeNumber=10 and (((VerbalPOD=-1) or (Canceled=-1) or ((DeliveryRequirement) = -1) or
(DateDiff(n,GetDate(),DeliveryRequirement)-(DestTimeAdjustment)>240) or (InvoiceType<>0)))) or
(GroupNodeNumber=20 and ((Canceled=0) and (NOT (DeliveryRequirement) = -1) and (DateDiff(n,GetDate(),DeliveryRequirement)-(DestTimeAdjustment)>240) and (VerbalPOD=0) and (InvoiceType=0))) or
(GroupNodeNumber=30 and ((Canceled=0) and (NOT (DeliveryRequirement) = -1) and (DateDiff(n,GetDate(),DeliveryRequirement)-(DestTimeAdjustment)>120) and (DateDiff(n,GetDate(),DeliveryRequirement)-(DestTimeAdjustment)<=240) and (VerbalPOD=0) and (InvoiceType=0))) or
(GroupNodeNumber=40 and ((Canceled=0) and (InvoiceType=0) and (VerbalPOD=0) and (NOT (DeliveryRequirement) = -1) and (DateDiff(n,GetDate(),DeliveryRequirement)-(DestTimeAdjustment)<=120))) or
(GroupNodeNumber=50 and ((ShipmentStatus='POD') and (VerbalPOD=0) and (InvoiceType=0)))

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Exec Sp_executesql Vs. Sp_executesql And Performance

Jul 23, 2005

This is a odd problem where a bad plan was chosen again and again, butthen not.Using the profiler, I identified an application-issued statement thatperformed poorly. It took this form:exec sp_executesql N'SELECT col1, col2 FROM t1 WHERE (t2= @Parm1)',N'@Parm1 int', @Parm1 = 8609t2 is a foreign key column, and is indexed.I took the statement into query analyzer and executed it there. Thequery plan showed that it was doing a scan of the primary key index,which is clustered. That's a bad choice.I then fiddled with it to see what would result in a good plan.1) I changed it to hard code the query value (but with the parmdefinition still in place. )It performed well, using the correct index.Here's how it looked.exec sp_executesql N'SELECT cbord.cbo1013p_AZItemElement.AZEl_Intid AS[Oid], cbord.cbo1013p_AZItemElement.incomplete_flag AS [IsIncomplete],cbord.cbo1013p_AZItemElement.traceflag AS [IsTraceAmount],cbord.cbo1013p_AZItemElement.standardqty AS [StandardAmount],cbord.cbo1013p_AZItemElement.Uitem_intid AS [NutritionItemOid],cbord.cbo1013p_AZItemElement.AZeldef_intid AS [AnalysisElementOid] FROMcbord.cbo1013p_AZItemElement WHERE (Uitem_intid= 8609)', N'@Parm1 int',@Parm1 = 8609After doing this, re-executing the original form still gave badresults.2) I restored the use of the parm, but removed the 'exec' from thestart.It performed well.After that (surprise!) it also performed well in the original form.What's going on here?

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EXEC Sp_executesql

Dec 7, 2007

Hi, I just had a quick question about this code and if I know what it is doing: Is it putting what is in variable @x18 into @Lost_Alumni?

Declare @Lost_Alumin datetime


Set @ParmDef_Ls = '@x18 DateTime OUTPUT, '


EXEC sp_executeSQL @ParmDef_Ls,
@x18 = @Lost_Alumni OUTPUT,



thanks,

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EXEC Sp_executesql Does Not Work

May 1, 2008

Hi everybody,

I have this problem I have been struggling with for more than an hour now, hoping for some help.
Using SQL Server 2005.


DECLARE @IPAddress nvarchar(15)
SET @IPAddress = '127.0.0.1'
DECLARE @UA nvarchar(300)
SET @UA = 'MSIE'
DECLARE @UserID int
SET @UserID = 123

EXEC sp_executesql N'User_LogonLog',N'@UserID int, @IPAddress nvarchar(15), @UA nvarchar(300)',@UserID,@IPAddress,@UA

It keeps given me the following error:

Msg 102, Level 15, State 1, Line 1
Incorrect syntax near 'User_LogonLog'.

In my head it should be perfectly valid syntax. I have also read Mr. Sommarskog's nice guide http://www.sommarskog.se/dynamic_sql.html, but no luck either..
I have tried to remove datatypes in parameters declaration, the Unicdode N' and so... nu luck.

If I run the following (without sp_executesql) there is no problem, which indicates the User_LogonLog procedure is work perfectly fine.

EXEC User_LogonLog @UserID,@IPAddress,@UA


What am I missing?

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Cannot Execute DDL Sql Batach Via EXEC Or Sp_executesql ???

Mar 26, 2008

Hi There

Ok i have a piece of test ddl sql that is written to a varchar(max) column. Entered by a user.

GO's and missing semi colons seem to break it, if you try to execute it with EXEC or sp_executesql, however the sql can be executed on Management Studio as is, so how can i execute it as is successfully?

In a nutshell i retreive the DDL sql from the column into a nvarchar(max) variable called @SQL , and i need to execute it.

I have tried:
EXEC(@SQL) and sp_executesql @SQL, both return the error , incorrect syntax near 'GO'.

The problem is obviously i have to have the go statements, in order to create some fo the ddl objects correctly. But EXEC and sp_executesql do not like that. I also found that semi colons are required after every statement.

The sql is as follows:

--===============================================================================

--DDL script

CREATE LOGIN TEST_LOGIN WITH PASSWORD = 'Whatever!@(!';

CREATE USER TEST_USER FROM LOGIN TEST_LOGIN;

CREATE TABLE TEST_TABLE (Column1 int NULL);

GRANT INSERT ON TEST_TABLE TO TEST_USER;

CREATE CLUSTERED INDEX TEST_INDEX ON TEST_TABLE (Column1);

GO

CREATE PROCEDURE TEST_PROCEDURES

AS

SELECT GETDATE();

GO

CREATE VIEW TEST_VIEW

AS

SELECT * FROM TEST_TABLE;

GO

--ALTER DDL

ALTER VIEW TEST_VIEW

AS

SELECT GETDATE() AS 'DATE';

GO

ALTER PROCEDURE TEST_PROCEDURES

AS

SELECT * FROM TEST_TABLE;

GO

--DROP DDL

DROP INDEX TEST_TABLE.TEST_INDEX;

DROP TABLE TEST_TABLE;

DROP VIEW TEST_VIEW;

DROP USER TEST_USER;

DROP LOGIN TEST_LOGIN;

DROP PROCEDURE TEST_PROCEDURES;

--===============================================================================

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Report Error Using Stored Procedure With Exec Sp_executesql

Feb 13, 2008

Hi,

Our report is working fine with data loaded from a stored procedure (#1) that contains a fairly simple Select statement. We need the same report to work with a dataset loaded from a stored procedure (#2) that uses 'Exec sp_executesql @queryString'. Unfortunately, attempts to call the latter cause an error in the report. From everything that I've read, there should be no difference between datasets created using either method. Any ideas what could be getting in the way of the latter?

I have doublechecked that the dynamic query is returning a valid dataset and that all the columns are in the same format as sp #1. The designer shows the dataset and the report with the data loaded, but the live system produces an error.

Any help is much appreciated.
Debbie

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From The Sql Profiler Constantly Displays Exec Sp_executesql N'BEGIN CONVERSATION TIMER ... It That Ok?

Mar 8, 2007

Hello,
I'm using SQL service Broker 2005 with ASP.NET 2.0 in order to use the sql cache dependency.
everything works fine...
I have only a doubt regarding a query that is constantly executed on mu db ( i can see it be means of the SQL Profiler)

The query is:
exec sp_executesql N'BEGIN CONVERSATION TIMER ("'') TIMEOUT = 120; WAITFOR(RECEIVE TOP (1) message_type_name, conversation_handle,
cast(message_body AS XML) as message_body from [SqlQueryNotificationService-GUID]), TIMEOUT @p2;',N'@p2 int',@p2=60000

The web application is not running from a browser ...

It this ok or I forget to clean/reset something from my web application and/or sql server?

Thank you

Marina B.





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Sp_executesql Performance

Sep 20, 2006

Hi All,

The following is cut from SQL profiler, database is SQL 2000 SP4. Query 1 takes almost zero time and 26 reads. Query 2 takes 16 millsecs and 2862 reads and the only difference is that Query2 has parameters. I have run the query's multiple times and in different order and the results are the same. My reading of the documentation says that Query 2 should be faster due to not having to recreate the execution plan. If the execution plan is a bad one and is cached how do I remove it. Is there anyway to force a recompile or am I know in stored procedure territory.

Can anyone give me an explanation as it looks like we should be changing our code to use literal's where ever possible rather than parameter substitution.

TIA

SQL:BatchCompleted exec sp_executesql N'select *

from PA_REC_RECEIPT_ALLOCATIONS

where RECEIPT_PREFIX = ''LMH''

and RECEIPT_SUFFIX = 10652

' Microsoft SQL Server Management Studio - Query 0 26 0 0 3256 51 2006-09-20 13:15:32.843

-- Query 2

SQL:BatchCompleted exec sp_executesql N'select *

from PA_REC_RECEIPT_ALLOCATIONS

where RECEIPT_PREFIX = @P1

and RECEIPT_SUFFIX = @P2

', N'@P1 varchar(3),@P2 int', 'LMH', 10652

Microsoft SQL Server Management Studio - Query 16 2862 0 13 3256 51 2006-09-20 13:15:35.830

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Strange Performance Problem With SELECT COUNT(1) And Sp_executesql

Feb 22, 2008

Hello,

I have the following queries that run on a view called EntrySummary:

1)

exec sp_executesql N'SELECT COUNT (1) FROM [dbo].[EntrySummary] WHERE [EntrySummary].[SubmissionStatusID] = @SubmissionStatusID0 AND [EntrySummary].[CreatedBy] = @CreatedBy1',N'@SubmissionStatusID0 int,@CreatedBy1 nvarchar(20)',@SubmissionStatusID0=4,@CreatedBy1=N'domainaperson'


2)
exec sp_executesql N'SELECT COUNT (1) FROM [dbo].[EntrySummary] WHERE [EntrySummary].[CreatedBy] = @CreatedBy1 AND [EntrySummary].[SubmissionStatusID] = @SubmissionStatusID0',N'@SubmissionStatusID0 int,@CreatedBy1 nvarchar(20)',@SubmissionStatusID0=4,@CreatedBy1=N'domainaperson'


(The only difference between the two queries being the order of the where clauses)

Both return the correct answer (4144), but Query 2 takes 10-15 seconds whereas Query 1 takes < second.
If the same query is resubmitted several times, this doesn't affect the times.

(The vast majority of the records have a status of 4, but only about 3% will be created by the person).

Replacing Count(1) with count(*) makes both queries return quickly.

Is sp_executesql creating poor execution plans ? Can anyone explain this behaviour?


Regards,
AndyM

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Sp_executesql From App's Dynamic SQL Causing Performance Problems Vs. Query From SSMS

Aug 12, 2006

Okay, so I came across an odd performance issue that I'm wondering if some guru can help me out with.

I have a query that uses a paging algorithm that uses a paging algorithm and a table variable, then gets a page of data based on a join to that table variable. Here's a simplified query using the algoritm:

--declare table variable... not shown for brevity

--make sure we only store the least amount of records possible
SET ROWCOUNT ( @pageNumber + 1 ) * @pageSize

--insert into table variable
INSERT INTO @TableVariable( Key )
SELECT key FROM table
WHERE whatever = @p1

--we only want one page of data
SET ROWCOUNT @pageSize

--now get the page of data from the table
SELECT key FROM table
WHERE whatever = @p1
AND [TableVar Identity Column] > @pageNumber * @pageSize

The algorithm works great for our needs, BUT, I noticed something a little odd about its behavior during performance testing.

In particular, when I run the query using Sql Server Management Studio, where I manually DECLARE all the variables it ends up needing only 156 reads to complete the job. When I call it from the app using ADO.NET, however, I noticed it needs 310 reads! Huh?

I looked for differences, and the only one I could determine was that ADO.NET passes the query and uses sp_executesql and passes the parameters vs. declaring and setting them statically before executing the query. I confirmed that this was the issue by manually running sp_execute SQL and seeing that it took roughly the same number of reads (274) to process the query.

Naturally, I don't want the time it takes to perfrom my query to double, but and frankly I don't understand why there would be a difference in performance. Can anyone help me track down what is going on and suggest to me how to fix the problem.

I assume that SQL Server Management Studio optimizes the execution path somehow, but I'm not sure how to gain the same benefit for my passed query. Can I enable something with hints? Is there something else going on that I should know about?

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Can Exec Select But Can't Exec Sp

Oct 31, 2007

I have two SQL Server 2000 (one is localhost, one is remote with VPN IP 192.168.5.4).

I can select * from [192.168.5.4].db.dbo.test but I can't exec [192.168.5.4].db..spAdd in localhost.

These select and sp is OK for 1 or 2 week without any problem,but it didn't work one day.

Can some one explain why?

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Sp_executesql

Jul 31, 2006

I have been trying to get my dynamic query to work with sp_executesql and I cant seem to figure out this one issue.DECLARE @SQL NVARCHAR(1000)SET @SQL = N'WITH Data AS(SELECT Id, Username, FirstName, LastName, Email, LastLogin, ROW_NUMBER() OVER(ORDER BY @SortExpression) AS RowNumber FROM Users) SELECT * FROM Data WHERE RowNumber BETWEEN @Between1 AND @Between2'EXECUTE sp_executesql @SQL,  N'@SortExpression VARCHAR(50), @Between1 INT, @Between2 INT',  @SortExpression = 'Email', @Between1 = 1, @Between2 = 10As you can see, the data should get sorted by the value of @SortExpression. However thats not the case. The Data does not get sorted at all no matter that i pass in as the value of @SortExpression.I can't seem to figure out why its not working.

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Sp_executeSql

Aug 8, 2005

What is wrong in this query..how can I make it to work


DECLARE @strSQL nVarchar(4000)
DECLARE @Name VArchar(100)

--SET @Name = '''sysdatabase'',''sysindexes'''

SET @Name = ''sysdatabase''
SET @strSQL = 'SELECT * FROM dbo.sysobjects WITH (NOLOCK) WHERE Name IN (@prmName)'

EXECUTE dbo.sp_executesql @strSQL,
N'@prmName varchar(100)',
@prmName= @Name


Note : I do not want to replace the query as

SET @strSQL = 'SELECT * FROM dbo.sysobjects WITH (NOLOCK)
WHERE Name IN ' + @Name + ')' , because my queryplan changes if I do this.

Any work around or anything you guys suggest ..

Thanks.

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Sp_executesql ¿qué?

Feb 27, 2008

I'm having trouble working out why the sp_executesql procedure is not replacing my place holders with the value assigned to it.

Some quick info: I'm running the routine from the commandline through OSQL on a box that has MSSQL2000 enterprise installed. The code is sent to a MSSQL2005 box.

I've noticed one dumb thing I've done and that is making the nvarchar variable @db_name a different size to the one declared in the sp_executesql command. But I'm not sure if that is the problem. It throws a @db_name is not a database error etc.

Snippet that is not working:

declare @db_name varchar(80)

declare @sql_command nvarchar(1500)-- for our dynamic sql command within the cursor loop.

fetch

next

from

settings_cursor

into

@db_name



while

@@fetch_status = 0

begin

print 'CHECKING DBOPTIONS FOR ' + @db_name + ' - ( CHECKSUM, CREATE & UPDATE STATS, FULLRECOVERY)'



set @sql_command ='select'

set @sql_command = @sql_command + 'count(*)'

set @sql_command = @sql_command + 'from'

set @sql_command = @sql_command + 'sys.databases'

set @sql_command = @sql_command + 'where'

set @sql_command = @sql_command + 'name = ''@db_name'''

set @sql_command = @sql_command + 'and'

set @sql_command = @sql_command + 'page_verify_option_desc = ''checksum'''

set @sql_command = @sql_command + 'and'

set @sql_command = @sql_command + 'is_auto_create_stats_on = 1'

set @sql_command = @sql_command + 'and'

set @sql_command = @sql_command + 'is_auto_update_stats_on =1'

set @sql_command = @sql_command + 'and'



-- select recovery model based upon database name.

if @db_name = 'DBAdmin'

or @db_name = 'Master'

or @db_name = 'Model'

or @db_name = 'msdb'

begin

set @sql_command = @sql_command + 'recovery_model_desc = ''simple'''

end

else

begin

set @sql_command = @sql_command + 'recovery_model_desc = ''full'''

end



-- include db chaining for Master database

if @db_name = 'Master'

begin

set @sql_command = @sql_command + 'and'

set @sql_command = @sql_command + 'is_db_chaining_on = 1'

end



-- execute sql command.

--print @sql_command



declare @count int

execute @count = sp_executesql @sql_command, N'@db_name nvarchar(20)',@db_name=@db_name



if @count = 0-- no records were returned as the settings were wrong.

begin

select 'Issue with settings. altering now'



if @db_name = 'DBAdmin'

or @db_name = 'Master'

or @db_name = 'Model'

or @db_name = 'msdb'

begin

alter database [@db_name] set recovery simple

alter database [@db_name] set page_verify checksum

end

else

begin

alter database [@db_name] set recovery full

alter database [@db_name] set page_verify checksum



end



if @db_name = 'msdb'

begin

alter database [@db_name] set db_chaining on

end



-- all databases get these switched on

alter database [@db_name] set auto_create_statistics on

alter database [@db_name] set auto_update_statistics on

end

else

begin

select 'all settings for ' + @db_name + ' are good'

end



fetch next from settings_cursor into @db_name

end



-- clean up

close settings_cursor

deallocate settings_cursor

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Sp_executesql

Jan 18, 2002

Hi
I am trying to execute sp_executesql dynamically. What I am trying to do is read all the user tables using a cursor build sql statement and using
EXEC sp_execute sqlstmt.
Here is piece of code.

DECLARE C1 CURSOR FOR SELECT NAME FROM SYSOBJECTS WHERE XTYPE='U'
OPEN c1
FETCH NEXT FROM C1 INTO @v_TableName
WHILE @@FETCH_STATUS = 0
BEGIN
SELECT @v_SQL= 'DROP TABLE ' + @v_TableName
--EXEC @v_SQL
PRINT @v_SQL
IF @v_Error<>0
BEGIN
SELECT @ErrorCount=@ErrorCount+1
PRINT 'ERROR OCCURED WHILE DROPING TABLE ' + @v_TableName
--GOTO ErrorHandler
END
FETCH NEXT FROM C1 INTO @v_TableName
END
CLOSE c1
DEALLOCATE C1

Please let me know where I am doing wrong.

Thanks,
Rau

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Sp_executesql

Sep 3, 2004

hi everybody
How can we execute a string of sql statements in Oracle ,similar to sp_executesql in sql server.
ie a string can contain insert into a table statement,delete a row from a table statement, update etc.
Thanks all of You

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Sp_executeSQL

Jan 7, 2004

Is there anything that will allow you to execute a line of sql code if it is longer than 4000 Unicode characters? The line of code is stored in a NVARCHAR Variable.

I'm using sp_ExecuteSQL and have hit the 4000 character wall

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Sp_executesql

Apr 10, 2008

I have a string which I want to pass into an IF statement. Here's what I have:

declare @sumclause varchar(4000)
set @sumclause = '(select count(*) from Participants where Weeks_Left<=8 or CDE_ACTV=''24'''

IF cast(@sumclause as int)>0
BEGIN
...
END

I'm first putting it in a string because I'm passing another string into it which can't be seen above.

As you can see, I tried casting it since it had a problem with computing a string as an int, but it still doesn't work. Help?

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Sp_executesql

Jul 23, 2005

Hi all,Can sp_executesql used inside a user defined function, itried but it has compiled well, but when i call the functio it showsOnly functions and extended stored procedures can be executed fromwithin a function.What i have went wrongThanks in advancethomson

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Help With Sp_executesql

Jul 20, 2005

I have a full sql statement which was generated dynamicly, and need toexecute that string and then take the output and generate aspreadsheet document based on the output. I'm new to sql and the bookI have doesn't really explain much. Anyone with an example of theirwork would be appreaciated.thank you.

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Sp_executesql

Oct 2, 2006

Hi There

Is a table variable invalid for sp_executesql ?

I am trying the following:

SELECT @SQL = N'WAITFOR

(RECEIVE message_body, conversation_handle, message_type_name, message_sequence_number, conversation_group_id FROM ' + @callingQueue + ' INTO @msgTable WHERE conversation_group_id = '

+ CAST(@conversationGroup AS char) + '), TIMEOUT 2000'

EXEC sp_executesql @SQL, N'@msgTable TABLE output', @msgTable out

I get the following message:

Msg 137, Level 15, State 2, Procedure CENTRAL_Queue_Processor, Line 92

Must declare the scalar variable "@msgTable".

I have decalred the variable but it is a table variable, this leadds me to believe sp_execute sql only supports scalar varibles not table variables, BOL does not say yes or no in this respect.

Can this be done?

Thanx

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Sp_executesql And Speed

Jul 12, 2006

Hello,
 
I am using sp_executesql this to pass parameter to sql string and I am seeing deadlock between sp_prepexec which does UPDATE with another UPDATE done by another process. When it comes to speed and deadlock, would you recomand not using sp_executesql?

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Avoid Sp_executesql With ADO.NET

Jan 30, 2008

 In out web application it happens very rarely that same query gets executed more than once meaning that sp_executesql is degrading performance. Does anyone know a way to tell ADO.NET to stop encapsulating queries in sp_executesql? Thank you.

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Question About Sp_executesql

Jul 18, 2005

Hi all,     I just wanted to know why this doesn't work: if @1's values is computer---------------------------------------------------------------------------------------------------------- BEGIN   FETCH NEXT FROM keyword_cursor into @1
  SELECT @sql = @sql + 'where title LIKE ' + '''%@x1%''' + ' OR notes like ' + '''%@x1%'''
  SELECT @paramlist = '@x1 nvarchar(200)'  print @sql  EXEC sp_executesql @sql, @paramlist, @1
  RETURN 0 ENDThe @sql string evaluates to:select title, notes from pubs..titles where title LIKE '%@x1%' OR notes like '%@x1%'-----------------------------------------------------------------------------------------------------------But this works: BEGIN   FETCH NEXT FROM keyword_cursor into @1
  SELECT @sql = @sql + 'where title LIKE ''%''+ @x1 + ''%'' OR notes like ''%'' + @x1 + ''%'''
  SELECT @paramlist = '@x1 nvarchar(200)'  print @sql  EXEC sp_executesql @sql, @paramlist, @1
  RETURN 0 ENDThe @sql string evaluates to:select title, notes from pubs..titles where title LIKE '%'+ @x1 + '%' OR notes like '%' + @x1 + '%'---------------------------------------------------------------------------------------------------------------I just don't get it ?? Doesn't sp_executesql just replaces the @x1 with @1?

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Problem With Sp_executesql

Jul 19, 2004

I try to write query that use sp_executesql to query data by Like operation with 1 parameter like below:
execute sp_executesql N'SELECT DISTINCT au_id,
au_lname,au_fname
FROM authors
WHERE au_lname LIKE @au_lname
',
N'@au_lname nVarChar',
@au_lname = N'%Cas%'

but It return all rows regardless of changing condition to any value.

But if i don't use sp_executesql like below:

SELECT DISTINCT au_id,
au_lname,au_fname
FROM authors
WHERE au_lname LIKE N'%Cas%'

It's correct!

Can anyone tell me why?

Thanks

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Problem With Sp_executesql

Jul 19, 2004

I try to write query that use sp_executesql to query data by Like operation with 1 parameter like below:
execute sp_executesql N'SELECT DISTINCT au_id,
au_lname,au_fname
FROM authors
WHERE au_lname LIKE @au_lname
',
N'@au_lname nVarChar',
@au_lname = N'%Cas%'

but It return all rows regardless of changing condition to any value.

But if i don't use sp_executesql like below:

SELECT DISTINCT au_id,
au_lname,au_fname
FROM authors
WHERE au_lname LIKE N'%Cas%'

It's correct!

Can anyone tell me why?

Thanks

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Sp_executesql Question

May 18, 2006

I have this code:
declare @a nvarchar(300), @camp nvarchar(15)

select @camp = camp from ref_activtot_paracnet where tip = 16011

set @a = 'select top 1 '+@camp+' from paracnet where datacalc = ''1/1/2005'''

exec sp_executesql @a

How can I store the value returned by the exec sp_executesql statement into a variable?

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Sp_executesql For Dummies

Jul 5, 2006

I have a stored procedure using dynamic SQL and I've been told I can no longer use 'exec (@strsql)' and have to use sp_executesql instead.

Fiiiiiiine...except I don't know how to use it and make it work with the parameter I'm passing in.

The original sproc that I have to change reads as:


CREATE PROCEDURE dbo.sp_LetsGetSomeData(@Filter nvarchar(200) = NULL)
AS

DECLARE @strSQL nvarchar(200)

IF @Filter IS NOT NULL
BEGIN
SET @strSQL = N'SELECT * FROM vwRandomViewName ' + @Filter
END

IF @Filter IS NULL
BEGIN
SET @strSQL = N'SELECT * FROM vwRandomViewName'
END

EXEC(@strSQL)


GO


And is called thusly:

EXEC sp_LetsGetSomeData @Filter = ' WHERE Team = ''RandomTeam'''

When I do this it never adds the filter. I tried to write a sproc like this:

CREATE PROC dbo.LetsGetSomeData2(@Filter nvarchar(200) = NULL)
AS

DECLARE @strSQL nvarchar(200)

SET @strSQL = N'SELECT * FROM vwRandomView'

EXECUTE sp_executesql @strSQL, @Filter
GO


and call it the same way as the original flavor sproc, it's as if I'm asking it to just select all from vwRandomView.

I know I'm doing something massively wrong but I'm just having a brain-dead day and can't make sense of the books online.

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Sp_executesql Help Needed

Jun 12, 2008

Hi,
I want to use the output of the sp_executesql to update a coulmn in the table.
example
-first i run the below to get output
execute sp_executesql @Query, @returnedCount output

-then I want to use that output to update another coulmn in the table
update tableName set coulmn=@returnedCount

I am new to this and cannot figure out how. Can someone please guide me?
thank you!!

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I Can't Use Sp_executesql Within Functions

Apr 9, 2007

Hi all
i have Function and in the context of this function i need to build a Dynamic Query String according to input parameters and execute it with sp_executesql. BUT until now i didn't know that SQL doesn't allow to have Exec command within a function,am i right?
Apparently this is true because for example create the following Function..

Create Function Test(@Input int)
Returns int
AS
Begin
Exec sp_who -- only for Test purpose
Return @Input
End

Now Execute this --> Select dbo.test(12).....
Sql Server will return the following Error

Server: Msg 557, Level 16, State 2, Procedure Test, Line 6
Only functions and extended stored procedures can be executed from within a function.

Could Any one help me? i need function with dynamic Sql execution because i can only use function in SELECT statements !!!

Any help greatly would be appreciated.
Kind Regards.

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How Can I Use Sp_executesql Make This.

Jan 31, 2008

I have this code:

USE BDPrincipal
GO

IF OBJECT_ID(N'aquery') is not null
DROP FUNCTION aquery
GO

CREATE FUNCTION aquery()
Returns nvarchar(500)
as
Begin
Declare @var nvarchar(500);
Set @var = 'Select Distinct Description from dbo.tblScanners';
Return @var
end
GO

exec sp_executesql aquery;



I created that code to prove if it works.
But the result doesn´t appear, and the message is:

Command(s) completed successfully.

I need it to work.

Because I need to create a very dinamic query.

Please help me!

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Feb 13, 2006

I have not used this sp. We have a dynamic SQL statement generated by a sp.For performance reasons I would like to use it to reduce the number ofexplain plans created. I would like to understand its usage and pitfalls(if any) to its use. Any comments from the user community?

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Sp_executesql Vs. EXECUTE

Dec 20, 2006

please, in simple words, what is difference between :sp_executesqlandEXECUTEin sql2005?

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