Try this script to create a temporary table TESTTEST and watch the order of precedence as the triggers are called in this order: 1) INSTEAD OF, 2) FOR, 3) AFTER
All of the logic is placed in INSTEAD OF trigger and I have 2 examples of how you might code some scenarios...
Good luck...
CREATE TABLE TESTTEST
(
ID INT,
Modified0 DATETIME,
Modified1 DATETIME
)
GO
CREATE TRIGGER [dbo].[tr_TESTTEST_0] ON [dbo].TESTTEST
INSTEAD OF INSERT,UPDATE,DELETE
AS
BEGIN
SELECT 'INSTEAD OF'
SELECT 'TT0.0'
SELECT * FROM TESTTEST
SELECT *, 'I' Mode
INTO #work
FROM INSERTED
UPDATE #work SET Mode='U' WHERE ID IN (SELECT ID FROM DELETED)
INSERT INTO #work (ID, Modified0, Modified1, Mode)
SELECT ID, Modified0, Modified1, 'D'
FROM DELETED WHERE ID NOT IN (SELECT ID FROM INSERTED)
--Check Security or any other logic to add and remove from #work before processing
DELETE FROM #work WHERE ID=9 -- because you don't want anyone to edit this id?!?!
DELETE FROM #work WHERE Mode='D' -- because you don't want anyone to delete any records
SELECT 'EV'
SELECT * FROM #work
IF(EXISTS(SELECT TOP 1 * FROM #work WHERE Mode='I'))
BEGIN
SELECT 'I0.0'
INSERT INTO dbo.TESTTEST (ID, Modified0, Modified1)
SELECT ID, Modified0, Modified1
FROM #work
WHERE Mode='I'
SELECT 'Cool stuff would happen here if you had FOR INSERT or AFTER INSERT triggers.'
SELECT 'I0.1'
END
IF(EXISTS(SELECT TOP 1 * FROM #work WHERE Mode='D'))
BEGIN
SELECT 'D0.0'
DELETE FROM TESTTEST WHERE ID IN (SELECT ID FROM #work WHERE Mode='D')
SELECT 'Cool stuff would happen here if you had FOR DELETE or AFTER DELETE triggers.'
SELECT 'D0.1'
END
IF(EXISTS(SELECT TOP 1 * FROM #work WHERE Mode='U'))
BEGIN
SELECT 'U0.0'
UPDATE t SET t.Modified0=e.Modified0, t.Modified1=e.Modified1
FROM dbo.TESTTEST t
INNER JOIN #work e ON e.ID = t.ID
WHERE e.Mode='U'
SELECT 'U0.1'
END
DROP TABLE #work
SELECT 'TT0.1'
SELECT * FROM TESTTEST
END
GO
CREATE TRIGGER [dbo].[tr_TESTTEST_1] ON [dbo].TESTTEST
FOR UPDATE
AS
BEGIN
SELECT 'FOR UPDATE'
SELECT 'TT1.0'
SELECT * FROM TESTTEST
SELECT 'I1'
SELECT * FROM INSERTED
SELECT 'D1'
SELECT * FROM DELETED
SELECT 'TT1.1'
SELECT * FROM TESTTEST
END
GO
CREATE TRIGGER [dbo].[tr_TESTTEST_2] ON [dbo].TESTTEST
AFTER UPDATE
AS
BEGIN
SELECT 'AFTER UPDATE'
SELECT 'TT2.0'
SELECT * FROM TESTTEST
SELECT 'I2'
SELECT * FROM INSERTED
SELECT 'D2'
SELECT * FROM DELETED
SELECT 'TT2.1'
SELECT * FROM TESTTEST
END
GO
SELECT 'Start'
INSERT INTO TESTTEST (ID, Modified0) VALUES (9, GETDATE())-- not going to insert
SELECT 'RESTART'
INSERT INTO TESTTEST (ID, Modified0) VALUES (10, GETDATE())--going to insert
SELECT 'RESTART'
UPDATE TESTTEST SET Modified1=GETDATE() WHERE ID=10-- gointo to update
SELECT 'RESTART'
DELETE FROM TESTTEST WHERE ID=10-- not going to DELETE
SELECT 'FINISHED'
SELECT * FROM TESTTEST
DROP TABLE TESTTEST