SQL Server/T-SQL Tutorial/Trigger/Utility trigger — различия между версиями
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Текущая версия на 10:24, 26 мая 2010
Содержание
A CREATE TRIGGER statement that corrects mixed-case state names
8> create table Bankers(
9> BankerID Integer,
10> BankerName VARCHAR(20),
11> BankerContactLName VARCHAR(20),
12> BankerContactFName VARCHAR(20),
13> BankerCity VARCHAR(20),
14> BankerState VARCHAR(20),
15> BankerZipCode VARCHAR(20),
16> BankerPhone VARCHAR(20)
17> )
18> 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> CREATE TRIGGER Bankers_INSERT_UPDATE
3> ON Bankers
4> AFTER INSERT,UPDATE
5> AS
6> UPDATE Bankers
7> SET BankerState = UPPER(BankerState)
8> WHERE BankerID IN (SELECT BankerID FROM Inserted)
9> GO
1>
2> insert into Bankers values (0, "GHJ Inc.","Bit","Lee", "Ticker", "MN","00000","000-000-0000");
3> GO
(1 rows affected)
1> drop trigger Bankers_INSERT_UPDATE;
2> GO
1>
2> drop table Bankers;
3> GO
1>
2>
A script that creates AFTER triggers to maintain referential integrity
4>
5> create table Billings (
6> BankerID INTEGER,
7> BillingNumber INTEGER,
8> BillingDate datetime,
9> BillingTotal INTEGER,
10> TermsID INTEGER,
11> BillingDueDate datetime ,
12> PaymentTotal INTEGER,
13> CreditTotal INTEGER
14>
15> );
16> GO
1>
2> INSERT INTO Billings VALUES (1, 1, "2005-01-22", 165, 1,"2005-04-22",123,321);
3> GO
(1 rows affected)
1> INSERT INTO Billings VALUES (2, 2, "2001-02-21", 165, 1,"2002-02-22",123,321.);
2> GO
(1 rows affected)
1> INSERT INTO Billings VALUES (3, 3, "2003-05-02", 165, 1,"2005-04-12",123,321);
2> GO
(1 rows affected)
1> INSERT INTO Billings VALUES (4, 4, "1999-03-12", 165, 1,"2005-04-18",123,321);
2> GO
(1 rows affected)
1> INSERT INTO Billings VALUES (5, 5, "2000-04-23", 165, 1,"2005-04-17",123,321);
2> GO
(1 rows affected)
1> INSERT INTO Billings VALUES (6, 6, "2001-06-14", 165, 1,"2005-04-18",123,321);
2> GO
(1 rows affected)
1> INSERT INTO Billings VALUES (7, 7, "2002-07-15", 165, 1,"2005-04-19",123,321);
2> GO
(1 rows affected)
1> INSERT INTO Billings VALUES (8, 8, "2003-08-16", 165, 1,"2005-04-20",123,321);
2> GO
(1 rows affected)
1> INSERT INTO Billings VALUES (9, 9, "2004-09-17", 165, 1,"2005-04-21",123,321);
2> GO
(1 rows affected)
1> INSERT INTO Billings VALUES (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> CREATE TRIGGER Banker_UPDATE_DELETE_RI
4> ON Bankers
5> AFTER DELETE,UPDATE
6> AS
7> IF EXISTS (SELECT * FROM Deleted JOIN Billings
8> ON Deleted.BankerID = Billings.BankerID)
9> BEGIN
10> RAISERROR("BankerID in use.",1,1)
11> ROLLBACK TRAN
12> END
13> GO
1>
2> CREATE TRIGGER Billing_INSERT_UPDATE_RI
3> ON Billings
4> AFTER INSERT,UPDATE
5> AS
6> IF NOT EXISTS (SELECT * FROM Bankers
7> WHERE BankerID IN (SELECT BankerID FROM Inserted))
8> BEGIN
9> RAISERROR("Invalid BankerID.",1,1)
10> ROLLBACK TRAN
11> END
12> GO
1>
2> DELETE Bankers
3> WHERE BankerID = 34
4> GO
(0 rows affected)
1>
2> drop TRIGGER Banker_UPDATE_DELETE_RI;
3> GO
1>
2> drop table Bankers;
3> GO
1>
2>
3> drop table Billings;
4> GO
Auditing Triggers
4>
5>
6> CREATE TABLE sales(
7> stor_id char(4) NOT NULL,
8> ord_num varchar(20) NOT NULL,
9> ord_date datetime NOT NULL,
10> qty smallint NOT NULL,
11> payterms varchar(12) NOT NULL,
12> title_id varchar(80)
13> )
14> GO
1> insert sales values("1", "QA7442.3", "09/13/94", 75, "ON Billing","1")
2> insert sales values("2", "D4482", "09/14/94", 10, "Net 60", "1")
3> insert sales values("3", "N914008", "09/14/94", 20, "Net 30", "2")
4> insert sales values("4", "N914014", "09/14/94", 25, "Net 30", "3")
5> insert sales values("5", "423LL922", "09/14/94", 15, "ON Billing","3")
6> insert sales values("6", "423LL930", "09/14/94", 10, "ON Billing","2")
7> GO
(1 rows affected)
(1 rows affected)
(1 rows affected)
(1 rows affected)
(1 rows affected)
(1 rows affected)
1> CREATE TABLE SalesArchive (
2> stor_id CHAR(4) NOT NULL,
3> ord_num VARCHAR(20) NOT NULL,
4> ord_date DATETIME NOT NULL,
5> qty SMALLINT NOT NULL,
6> payterms VARCHAR(12) NOT NULL,
7> title_id CHAR(4),
8> )
9> GO
1>
2>
3> CREATE TRIGGER trSales_Del ON sales
4> FOR DELETE
5> AS
6> INSERT SalesArchive
7> SELECT stor_id, ord_num, ord_date, qty, payterms, title_id
8> FROM deleted
9> GO
1>
2>
3> drop trigger trSales_Del;
4> GO
1>
2> drop table SalesArchive;
3> GO
1> drop table sales;
2> GO
Creating the UpdateLog table and an update trigger on the authors table.
4>
5>
6> CREATE TABLE authors(
7> au_id varchar(11),
8> au_lname varchar(40) NOT NULL,
9> au_fname varchar(20) NOT NULL,
10> phone char(12) NOT NULL DEFAULT ("UNKNOWN"),
11> address varchar(40) NULL,
12> city varchar(20) NULL,
13> state char(2) NULL,
14> zip char(5) NULL,
15> contract bit NOT NULL
16> )
17> GO
1> insert authors values("1", "Joe", "Abra", "111 111-1111", "6 St.", "Berkeley", "CA", "11111", 1)
2> insert authors values("2", "Jack", "Majo", "222 222-2222", "3 St.", "Oakland" , "CA", "22222", 1)
3> insert authors values("3", "Pink", "Cherry", "333 333-3333", "5 Ln.", "Vancouver", "BC", "33333", 1)
4> insert authors values("4", "Blue", "Albert", "444 444-4444", "7 Av.", "Vancouver", "BC", "44444", 1)
5> insert authors values("5", "Red", "Anne", "555 555-5555", "6 Av.", "Regina", "SK", "55555", 1)
6> insert authors values("6", "Black", "Michel", "666 666-6666", "3 Pl.", "Regina", "SK", "66666", 1)
7> insert authors values("7", "White", "Sylvia", "777 777-7777", "1 Pl.", "Rockville", "MD", "77777", 1)
8> insert authors values("8", "Yellow","Heather","888 888-8888", "3 Pu", "Vacaville", "CA", "88888", 0)
9> insert authors values("9", "Gold", "Dep", "999 999-9999", "5 Av.", "Oakland", "CA", "99999", 0)
10> insert authors values("10", "Siler", "Dean", "000 000-0000", "4 Av.", "Oakland", "CA", "00000", 1)
11> GO
(1 rows affected)
(1 rows affected)
(1 rows affected)
(1 rows affected)
(1 rows affected)
(1 rows affected)
(1 rows affected)
(1 rows affected)
(1 rows affected)
(1 rows affected)
1>
2> CREATE TABLE UpdateLog
3> (
4> table_name VARCHAR(30) NOT NULL,
5> column_name VARCHAR(30) NOT NULL,
6> updated_by VARCHAR(30) NOT NULL,
7> updated_when DATETIME NOT NULL
8> )
9> GO
1>
2> CREATE TRIGGER trAuthors_Upd ON Authors
3> FOR UPDATE
4> AS
5> DECLARE @intRowCount int
6> SELECT @intRowCount = @@RowCount
7> IF @intRowCount > 0
8> BEGIN
9> IF UPDATE(au_id)
10> INSERT UpdateLog VALUES ("authors", "au_id", suser_name(), getdate())
11> IF UPDATE(au_lname)
12> INSERT UpdateLog VALUES ("authors", "au_lname", suser_name(), getdate())
13> IF UPDATE(au_fname)
14> INSERT UpdateLog VALUES ("authors", "au_fname", suser_name(), getdate())
15> IF UPDATE(phone)
16> INSERT UpdateLog VALUES ("authors", "phone", suser_name(), getdate())
17> IF UPDATE(address)
18> INSERT UpdateLog VALUES ("authors", "address", suser_name(), getdate())
19> IF UPDATE(city)
20> INSERT UpdateLog VALUES ("authors", "city", suser_name(), getdate())
21> IF UPDATE(state)
22> INSERT UpdateLog VALUES ("authors", "state", suser_name(), getdate())
23> IF UPDATE(zip)
24> INSERT UpdateLog VALUES ("authors", "zip", suser_name(), getdate())
25> IF UPDATE(contract)
26> INSERT UpdateLog VALUES ("authors", "contract", suser_name(), getdate())
27> END
28> GO
1>
2>
3> drop trigger trAuthors_Upd;
4> GO
1>
2> drop table sales;
3> drop table UpdateLog;
4> GO