HELP!!... How To Find Out If A Table Exists
Aug 10, 1999I need a snippet of code that will determine wether or not a table exists in a database...
thanx
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How To Find That The Table Column Exists Through Program
Jul 12, 2007i need to check that the column exist in the table if yes the update/insert value in the column else i need to add the new column like new browser name in the table.
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Sep 20, 2006Hi,
This is on Sybase but I'm guessing that the same situation would happen on SQL Server. (Please confirm if you know).
I'm looking at these new databases and I'm seeing code similar to this all over the place:
if not exists (select 1 from dbo.t1 where f1 = @p1)
begin
select @errno = @errno | 1
end
There's a unique clustered in dex on t1.f1.
The execution plan shows this for this statement:
FROM TABLE
dbo.t1
EXISTS TABLE : nested iteration.
Table Scan.
Forward scan.
Positioning at start of table.
It's not using my index!!!!!
It seems to be the case with EXISTS statements. Can anybody confirm?
I also hinted to use the index but it still didn't use it.
If the existence check really doesn't use the index, what's a good code alternative to this check?
I did this and it's working great but I wonder if there's a better alternative. I don't really like doing the SET ROWCOUNT 1 and then SET ROWCOUNT 0 thing. SELECT TOP 1 won't work on Sybase, :-(.
SET ROWCOUNT 1
SELECT @cnt = (SELECT 1 FROM dbo.t1 (index ix01)
WHERE f1 = @p1
)
SET ROWCOUNT 0
Appreciate your help.
Cannot Find File ID 2 On Device 'xxx' - But It Exists!!
Nov 9, 2007I'm following these instructions: http://technet.microsoft.com/en-us/library/ms156421.aspx
I run this restore letting it create the database. It works fine:
RESTORE DATABASE ReportServer
FROM DISK='\MYMACHINEe$BackupsReportingServicesReportServerData.bak'
WITH NORECOVERY,
MOVE 'ReportServer' TO
'G:DataReportServer.mdf',
MOVE 'ReportServer_log' TO
'J:LogsReportServer_Log.ldf';
GO
I run this command and get this result set, with the fileIDs in red.
Restore filelistonly from disk = '\MYMACHINEe$BackupsReportingServicesReportServerLog.bak'
ReportServer2005
d:Program FilesMicrosoft SQL ServerMSSQLdataReportServer2005.mdf D
PRIMARY 3407872 35184372080640 1 0 0 9A65122E-36B7-4D93-A0FB-F1A894641A09 0 0 0 512 1 NULL 62000000029300037 D49504CB-7E10-4BA3-B737-F2F9F2070F39 0 1
ReportServer2005_log
d:Program FilesMicrosoft SQL ServerMSSQLdataReportServer2005_log.LDF L NULL 3211264 2199023255552 2 0 0 0D6FE3C7-C5CC-49FB-A66C-43272EB47763 0 0 0 512 0 NULL 0 00000000-0000-0000-0000-000000000000 0 1
then I run this LOG restore:
RESTORE LOG ReportServer
FROM DISK='\MYMACHINEe$BackupsReportingServicesReportServerLog.bak'
WITH NORECOVERY, FILE=2,
MOVE 'ReportServer2005' TO
'G:DataReportServer.mdf',
MOVE 'ReportServer2005_log' TO
'J:LogsReportServer_Log.ldf';
GO
Msg 4038, Level 16, State 1, Line 1
Cannot find file ID 2 on device '\MYMACHINEe$BackupsReportingServicesReportServerLog.bak'.
Msg 3013, Level 16, State 1, Line 1
RESTORE LOG is terminating abnormally.
I see file ID 2 identifying the log file. I've never done a restore like this - using copy_only and backing the database and log into separate .bak files, so maybe I'm misunderstanding something here.
Thanks for any help
Sam
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The proper way to check the existence of a table would be:
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However, to get this to run for a temp table, I think you'd have to change the database context to tempdb and then back to your database. That doesn't seem efficient.
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May 20, 2008Hi,
This my first time using the link server to read the files directly from within SQL2005, so issues the following link:-
EXEC sp_addlinkedserver
@server = N'MYVFPSERVER', -- Your linked server name here
@srvproduct=N'Visual FoxPro 9', -- can be anything
@provider=N'VFPOLEDB',
@datasrc=N'"C:PROGRAM FILESMICROSOFT VISUAL FOXPRO 9Samplesdata estdata.dbc"'
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Best regards
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