An after-update trigger : Trigger for after « Trigger « SQL Server / T-SQL Tutorial






9> create table Billings (
10>     BillingID           INTEGER,
11>     BankerID           INTEGER,
12>     BillingNumber      INTEGER,
13>     BillingDate        datetime,
14>     BillingTotal       INTEGER,
15>     TermsID            INTEGER,
16>     BillingDueDate     datetime ,
17>     PaymentTotal       INTEGER,
18>     CreditTotal        INTEGER
19>
20> );
21> GO
1>
2> INSERT INTO Billings VALUES (1,1, 1, '2005-01-22', 165, 1,'2005-04-22',123,321);
3> GO

(1 rows affected)
1> INSERT INTO Billings VALUES (2,2, 2, '2001-02-21', 165, 1,'2002-02-22',123,321.);
2> GO

(1 rows affected)
1> INSERT INTO Billings VALUES (3,3, 3, '2003-05-02', 165, 1,'2005-04-12',123,321);
2> GO

(1 rows affected)
1> INSERT INTO Billings VALUES (4,4, 4, '1999-03-12', 165, 1,'2005-04-18',123,321);
2> GO

(1 rows affected)
1> INSERT INTO Billings VALUES (5,5, 5, '2000-04-23', 165, 1,'2005-04-17',123,321);
2> GO

(1 rows affected)
1> INSERT INTO Billings VALUES (6,6, 6, '2001-06-14', 165, 1,'2005-04-18',123,321);
2> GO

(1 rows affected)
1> INSERT INTO Billings VALUES (7,7, 7, '2002-07-15', 165, 1,'2005-04-19',123,321);
2> GO

(1 rows affected)
1> INSERT INTO Billings VALUES (8,8, 8, '2003-08-16', 165, 1,'2005-04-20',123,321);
2> GO

(1 rows affected)
1> INSERT INTO Billings VALUES (9,9, 9, '2004-09-17', 165, 1,'2005-04-21',123,321);
2> GO

(1 rows affected)
1> INSERT INTO Billings VALUES (0,0, 0, '2005-10-18', 165, 1,'2005-04-22',123,321);
2> GO

(1 rows affected)
1>
2>
3> create table Bankers(
4>    BankerID             Integer,
5>    BankerName           VARCHAR(20),
6>    BankerContactLName   VARCHAR(20),
7>    BankerContactFName   VARCHAR(20),
8>    BankerCity           VARCHAR(20),
9>    BankerState          VARCHAR(20),
10>    BankerZipCode        VARCHAR(20),
11>    BankerPhone          VARCHAR(20)
12> )
13> GO
1>
2> insert into Bankers values (1, 'ABC Inc.','Joe','Smith','Vancouver','BC','11111','111-111-1111');
3> GO

(1 rows affected)
1> insert into Bankers values (2, 'DEF Inc.','Red','Rice', 'New York', 'DE','22222','222-222-2222');
2> GO

(1 rows affected)
1> insert into Bankers values (3, 'HJI Inc.','Kit','Cat',  'Paris',    'CA','33333','333-333-3333');
2> GO

(1 rows affected)
1> insert into Bankers values (4, 'QWE Inc.','Git','Black','Regina',   'ER','44444','444-444-4444');
2> GO

(1 rows affected)
1> insert into Bankers values (5, 'RTY Inc.','Wil','Lee',  'Toronto',  'YU','55555','555-555-5555');
2> GO

(1 rows affected)
1> insert into Bankers values (6, 'YUI Inc.','Ted','Larry','Calgary',  'TY','66666','666-666-6666');
2> GO

(1 rows affected)
1> insert into Bankers values (7, 'OIP Inc.','Yam','Act',  'San Franc','FG','77777','777-777-7777');
2> GO

(1 rows affected)
1> insert into Bankers values (8, 'SAD Inc.','Hit','Eat',  'Orland',   'PO','88888','888-888-8888');
2> GO

(1 rows affected)
1> insert into Bankers values (9, 'DFG Inc.','Sad','Lee',  'Wisler',   'PL','99999','999-999-9999');
2> GO

(1 rows affected)
1> insert into Bankers values (0, 'GHJ Inc.','Bit','Lee',  'Ticker',   'MN','00000','000-000-0000');
2> GO

(1 rows affected)
1>
2>
3>
4> CREATE TRIGGER Billings_UPDATE
5>     ON Billings
6>     AFTER UPDATE
7> AS
8> IF EXISTS
9>  (SELECT *
10>   FROM Deleted JOIN Billings
11>     ON Deleted.BillingID = Billings.BillingID
12>   WHERE Deleted.PaymentTotal <> Billings.PaymentTotal)
13>   BEGIN
14>     IF EXISTS
15>      (SELECT *
16>       FROM Billings JOIN
17>           (SELECT BillingID, SUM(BillingLineItemAmount) AS SumOfBillings
18>            FROM BillingLineItems
19>            GROUP BY BillingID) AS LineItems
20>         ON Billings.BillingID = LineItems.BillingID
21>       WHERE (Billings.BillingTotal <> LineItems.SumOfBillings) AND
22>             (LineItems.BillingID IN (SELECT BillingID FROM Deleted)))
23>       BEGIN
24>         RAISERROR('Correct line item amounts before posting payment.',1,1)
25>         ROLLBACK TRAN
26>       END
27>   END
28> GO
1>
2> UPDATE Billings
3> SET PaymentTotal = 662
4> WHERE BillingID = 100
5> GO

(0 rows affected)
1>
2> drop TRIGGER Billings_UPDATE;
3> GO
1>
2>
3> drop table Bankers;
4> GO
1>
2>
3> drop table Billings;
4> GO








22.3.Trigger for after
22.3.1.One table with two after-delete triggers
22.3.2.An after-update trigger
22.3.3.Rolling Back in an AFTER Trigger
22.3.4.Using an AFTER Trigger to Remove Time from a datetime Column