Insert the data into two tables at a time.

Question

Hi ,
i have these two tables
create table [dbo].[test1](
[test1_id] [int] identity(1,1) primary key,
[test2_id] [int] not null
create table [dbo].[test2](
[test2_id] [int] identity(1,1) primary key,
[test1_id] [int] not null
alter table [dbo].[test1]
add constraint [fk_test1_test2_id] foreign key([test2_id])
references [dbo].[test2] ([test2_id])
alter table [dbo].[test2] add constraint [fk_test2_test2_id] foreign key([test1_id])
references [dbo].[test1] ([test1_id])
I want to insert the data into two tables in one insert statement. How can i do this using T-SQL ?
Thanks in advance.

Answer 1

You can INSERT into both tables within one Transaction but not in one statement. By the way, you would need to alter your dbo.Test1 table to allow null for first INSERT test2_id column
See sample code below:
CREATE TABLE #test1(test1_ID INT IDENTITY(1,1),test2_id INT NULL)
CREATE TABLE #test2(test2_ID INT IDENTITY(1,1),test1_ID INT)
DECLARE @Test1dentity INT
DECLARE @Test2dentity INT
BEGIN TRAN
-- Insert NULL as test2_ID value is unknown
INSERT INTO #test1(test2_ID)
SELECT NULL;
-- get inserted identity value
SET @Test1dentity = SCOPE_IDENTITY();
INSERT INTO #test2(test1_ID)
SELECT @Test1dentity;
-- get inserted identity value
SET @Test2dentity = SCOPE_IDENTITY();
-- Update test1 table
UPDATE #test1
SET test2_ID = @Test2dentity
WHERE test1_ID = @Test1dentity;
COMMIT
SELECT * FROM #test1;
SELECT * FROM #test2;
-- Drop temp tables
IF OBJECT_ID('tempdb..#test1') IS NOT NULL
BEGIN
DROP TABLE #test1
END
IF OBJECT_ID('tempdb..#test2') IS NOT NULL
BEGIN
DROP TABLE #test2
END
web: www.ronnierahman.com