Question

I need to insert @N rows with random float values into one table and use IDs of every new inserted row for another INSERT. All this I need to do in stored procedure. For example:

CREATE PROCEDURE Proc
    @N int
AS

-- START LOOP, REPEAT @N TIMES
INSERT INTO [T1]
    ([Value])
VALES
    (<random_float>)

INSERT INTO [T2]
    ([ValueID])
VALUES
    (@@IDENTITY)
-- END LOOP

END
GO

Thanks in advance.

Answer 1

No loops, one insert

;WITH cte AS
(  --there are easier ways to build a numbers table
   SELECT
       ROW_NUMBER() OVER (ORDER BY (select 0)) AS rn
   FROM
      sys.columns c1 CROSS JOIN sys.columns c2 CROSS JOIN sys.columns c3
)
INSERT INTO [T1] ([Value])
OUTPUT INSERTED.ID INTO T2  -- direct insert to T2
SELECT RAND(CHECKSUM(NEWID()))
FROM cte
WHERE rn <= @N;