use variable @dbname in a stored procedure

Hello,

I try to use variable @dbname in a script, the following error is returned :Incorrect syntax near ')'.

declare @dbname as varchar (50)
set @dbname = 'TESTDB'

IF NOT EXISTS (SELECT name FROM ['+@dbname+'].sys.indexes WHERE name = 'TECH_IX_DOMAINID_GROUPID_RECORDTYPE')

Thanks

Regards
bibi92Asked:
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Vitor MontalvãoMSSQL Senior EngineerCommented:
You need to put the full select command into a variable and the execute it:
declare @MySelect as varchar (MAX)
declare @dbname as varchar (50)
 set @dbname = 'TESTDB'

set @MySelect = 'IF NOT EXISTS (SELECT name FROM ['+@dbname+'].sys.indexes WHERE name = '''TECH_IX_DOMAINID_GROUPID_RECORDTYPE''')'

EXECUTE(@MySelect)

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bibi92Author Commented:
Thanks Incorrect syntax near 'TECH_IX_DOMAINID_GROUPID_RECORDTYPE'.
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Deepak ChauhanSQL Server DBACommented:
Remove one extra ' from the begin and end of the string like below and start your begin statement before executing the variable in execute command otherwise it will give you error again.

''TECH_IX_DOMAINID_GROUPID_RECORDTYPE''

declare @MySelect as varchar (MAX)
declare @dbname as varchar (50)
 set @dbname = 'TESTDB'

set @MySelect = 'IF NOT EXISTS (SELECT name FROM ['+@dbname+'].sys.indexes WHERE name = ''TECH_IX_DOMAINID_GROUPID_RECORDTYPE'') begin ...... end'

EXECUTE(@MySelect)
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Vitor MontalvãoMSSQL Senior EngineerCommented:
So, all the points going to another Expert just because an extra quote?
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