Syntax error in SQL Server script

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Syntax error in SQL Server script

I'm currently working on table partitioning. I'm struggling with using this " SELECT MAX(NAME) from sys.filegroups WHERE NAME NOT LIKE 'PRIMARY' " in order to get the last used Filegroup. Now this works just fine, but when I run the following script: --Decalre variables DECLARE @LastFilegroupName VARCHAR(50) DECLARE @FilegroupName VARCHAR(50) --Retuns the next FileGroup to be used SET @LastFilegroupName = (select MAX(NAME) from sys.filegroups WHERE NAME NOT LIKE 'PRIMARY') SET @LastFilegroupName = Replace(@LastFilegroupName,'FileGrp','') SET @FilegroupName = 'FileGrp' + CAST((@LastFilegroupName + 1) as varchar(10)) --Alter database statement ALTER DATABASE VadivelTesting ADD FILEGROUP @NewFG_Name This script gives the following error "Incorrect syntax near '@NewFG_Name'." When I give it a static name it works fine, but not with the variable. What should I do?

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