execute procedure for a sequence of elements (execute theProc (select id from table))

Question

I need to execute the procedure deleteQuestion for each element that was returned by this select query:

select id from questions where Stuff = @Stuff

execute deleteQuestion id

something like:
execute deleteQuestion each(select id fom questions where Stuff = @Stuff)

anybody knows how ?

Answer 1

Use a cursor:

DECLARE @Id INT
DECLARE your_cursor CURSOR FOR 
SELECT id from questions where Stuff = @Stuff 

OPEN your_cursor 

FETCH NEXT FROM your_cursor 
INTO @Id

WHILE @@FETCH_STATUS = 0
BEGIN

    execute deleteQuestion @Id

    FETCH NEXT FROM your_cursor 
        INTO @Id

END 
CLOSE your_cursor
DEALLOCATE your_cursor

Answer 2

I did it like this:

declare @sqlstr nvarchar(max)

set @sqlstr = ''

select  @sqlstr = @sqlstr + ' exec deleteQuestion ' + cast(q.id as nvarchar(max))
from Questions q where stuff = @stuff

exec (@sqlstr)

I've been told that this approach is much faster than a cursor