Question

I need to use a select expression in a while loop and I use the below sample code:

 declare @i integer
 set @i=1
 while (@i<10)
 begin
   select @i as m;
   set @i=@i+1
 END 

this code returns 10 separate table! I want it to return all select results in one table… is that possible? if yes… how?

Answer 1

You can use a temp table or table variable for this.

Here’s how to do it using a temp table.

CREATE TABLE #t (m INT)
DECLARE @i INT
SET @i=1
WHILE (@i<10)
BEGIN
  INSERT INTO #t SELECT @i
  SET @i=@i+1
END 
SELECT m FROM #t

Very similar with a table variable

DECLARE @t TABLE (m INT)
DECLARE @i INT
SET @i=1
WHILE (@i<10)
BEGIN
  INSERT INTO @t SELECT @i
  SET @i=@i+1
END 
SELECT m FROM @t