Cursor with Dynamic SQL Query - sql

Question

I'm trying to make a dynamic query, using a cursor, I wanna create filegroups to every tables on my database, I have this:
DECLARE #name VARCHAR(50)
DECLARE #query VARCHAR(50)
DECLARE vend_cursor CURSOR
FOR SELECT name FROM sys.tables order by name asc
OPEN vend_cursor
FETCH NEXT FROM vend_cursor;
WHILE ##FETCH_STATUS = 0
BEGIN
PRINT 'FG_'+#name
FETCH NEXT FROM vend_cursor INTO #name;
END
CLOSE vend_cursor
DEALLOCATE vend_cursor
The print is because then I can see how the filegroup name will be, but I wanna add this:
ALTER DATABASE AdventureWorks2012
ADD FILEGROUP FG_filegroupname
I know I have to use 'exec sys.sp_executesql', but how can I add this to my query? thanks in advance

Answer 1

Yes you can do this with sp_executeSQL but the most important thing is that you need to setup a GLOBAL cursor, because sp_executeSQL is not in the same scope as the procedure which you are executing. See example
DECLARE #SQL nvarchar(1024),
#name varchar(255);
SET #SQL = 'DECLARE vend_cursor CURSOR GLOBAL
FOR
SELECT name FROM sys.tables order by name asc';
EXECUTE sp_executesql #SQL;
OPEN vend_cursor
FETCH NEXT FROM vend_cursor INTO #name;
WHILE ##FETCH_STATUS = 0
BEGIN
PRINT 'FG_'+#name
FETCH NEXT FROM vend_cursor INTO #name;
END
CLOSE vend_cursor
DEALLOCATE vend_cursor