SQL Server/T-SQL/Trigger/INSTEAD OF Trigger — различия между версиями
Admin (обсуждение | вклад) м (1 версия) |
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(нет различий)
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Текущая версия на 10:20, 26 мая 2010
INSTEAD OF DELETE on a trigger
2>
3>
4>
5> CREATE TABLE Customers (
6> CustomerID nchar (5) NOT NULL ,
7> CompanyName nvarchar (40) NOT NULL ,
8> ContactName nvarchar (30) NULL ,
9> ContactTitle nvarchar (30) NULL ,
10> Address nvarchar (60) NULL ,
11> City nvarchar (15) NULL ,
12> Region nvarchar (15) NULL ,
13> PostalCode nvarchar (10) NULL ,
14> Country nvarchar (15) NULL ,
15> Phone nvarchar (24) NULL ,
16> Fax nvarchar (24) NULL
17> )
18> GO
1>
2> INSERT Customers VALUES("1","A","Maria", "Sales", "Str. 57", "Berlin" ,NULL,"12209", "Germany","111-1111111","111-1111111")
3> INSERT Customers VALUES("2","M","Joe", "Owner", "Ave. 231","Vancouver" ,NULL,"05023", "Mexico", "(222) 222-3332",NULL)
4> INSERT Customers VALUES("3","H","Thomas", "Sales", "Sq. 111","London" ,NULL,"1D00P", "UK", "(444) 444-4444","(444) 444-4444")
5> INSERT Customers VALUES("4","B","Berg", "Order", "Blv 8","Toronto" ,NULL,"00222", "Sweden", "4444-55 55 65","5555-55 55 55")
6> INSERT Customers VALUES("5","S","Moos", "Sales", "Fort 57","New York" ,NULL,"68306", "Germany","6666-66666","6666-77777")
7> INSERT Customers VALUES("6","F","Cite", "Manager","24 ","Dalles" ,NULL,"67000", "France", "88.60.15.31","88.60.15.32")
8> INSERT Customers VALUES("7","C","Sommer", "Owner", "Araq, 67","Paris" ,NULL,"28023", "Spain", "(91) 555 22 82","(91) 555 91 99")
9> INSERT Customers VALUES("8","P","Leb", "Owner", "12 ","Beijing" ,NULL,"13008", "France", "91.24.45.40","91.24.45.41")
10> INSERT Customers VALUES("9","D","Elizabeth","Manager","23 Blvd.","Tsawassen","BC", "T2F8M4","Canada", "(604) 555-4729","(604) 555-3745")
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>
2> CREATE VIEW CustomerOrders_vw
3> WITH SCHEMABINDING
4> AS
5> SELECT cu.rupanyName
6> FROM dbo.Customers AS cu
7> GO
1>
2>
3>
4> CREATE TRIGGER trCustomerOrderUpdate ON CustomerOrders_vw
5> INSTEAD OF DELETE
6> AS
7> BEGIN
8> IF (SELECT COUNT(*) FROM Inserted) > 0
9> BEGIN
10> RAISERROR("No matching Orders. Cannot perform insert",10,1)
11> END
12> END
13> GO
1> drop TRIGGER trCustomerOrderUpdate;
2> drop view CustomerOrders_vw;
3> drop table Customers;
4> GO
INSTEAD OF INSERT on a trigger
2>
3> CREATE TABLE Customers (
4> CustomerID nchar (5) NOT NULL ,
5> CompanyName nvarchar (40) NOT NULL ,
6> ContactName nvarchar (30) NULL ,
7> ContactTitle nvarchar (30) NULL ,
8> Address nvarchar (60) NULL ,
9> City nvarchar (15) NULL ,
10> Region nvarchar (15) NULL ,
11> PostalCode nvarchar (10) NULL ,
12> Country nvarchar (15) NULL ,
13> Phone nvarchar (24) NULL ,
14> Fax nvarchar (24) NULL
15> )
16> GO
1>
2> INSERT Customers VALUES("1","A","Maria", "Sales", "Str. 57", "Berlin" ,NULL,"12209", "Germany","111-1111111","111-1111111")
3> INSERT Customers VALUES("2","M","Joe", "Owner", "Ave. 231","Vancouver" ,NULL,"05023", "Mexico", "(222) 222-3332",NULL)
4> INSERT Customers VALUES("3","H","Thomas", "Sales", "Sq. 111","London" ,NULL,"1D00P", "UK", "(444) 444-4444","(444) 444-4444")
5> INSERT Customers VALUES("4","B","Berg", "Order", "Blv 8","Toronto" ,NULL,"00222", "Sweden", "4444-55 55 65","5555-55 55 55")
6> INSERT Customers VALUES("5","S","Moos", "Sales", "Fort 57","New York" ,NULL,"68306", "Germany","6666-66666","6666-77777")
7> INSERT Customers VALUES("6","F","Cite", "Manager","24 ","Dalles" ,NULL,"67000", "France", "88.60.15.31","88.60.15.32")
8> INSERT Customers VALUES("7","C","Sommer", "Owner", "Araq, 67","Paris" ,NULL,"28023", "Spain", "(91) 555 22 82","(91) 555 91 99")
9> INSERT Customers VALUES("8","P","Leb", "Owner", "12 ","Beijing" ,NULL,"13008", "France", "91.24.45.40","91.24.45.41")
10> INSERT Customers VALUES("9","D","Elizabeth","Manager","23 Blvd.","Tsawassen","BC", "T2F8M4","Canada", "(604) 555-4729","(604) 555-3745")
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>
2> CREATE VIEW CustomerOrders_vw
3> WITH SCHEMABINDING
4> AS
5> SELECT cu.rupanyName
6> FROM dbo.Customers AS cu
7> GO
1>
2>
3> CREATE TRIGGER trCustomerOrderInsert ON CustomerOrders_vw
4> INSTEAD OF INSERT
5> AS
6> BEGIN
7> IF (SELECT COUNT(*) FROM Inserted) > 0
8> BEGIN
9> RAISERROR("No matching Orders. Cannot perform insert",10,1)
10> END
11> END
12> GO
1>
2> drop view CustomerOrders_vw;
3> GO
INSTEAD OF UPDATE Triggers
4>
5>
6>
7> CREATE TABLE Customers (
8> CustomerID nchar (5) NOT NULL ,
9> CompanyName nvarchar (40) NOT NULL ,
10> ContactName nvarchar (30) NULL ,
11> ContactTitle nvarchar (30) NULL ,
12> Address nvarchar (60) NULL ,
13> City nvarchar (15) NULL ,
14> Region nvarchar (15) NULL ,
15> PostalCode nvarchar (10) NULL ,
16> Country nvarchar (15) NULL ,
17> Phone nvarchar (24) NULL ,
18> Fax nvarchar (24) NULL
19> )
20> GO
1>
2> INSERT Customers VALUES("1","A","Maria", "Sales", "Str. 57", "Berlin" ,NULL,"12209", "Germany","111-1111111","111-1111111")
3> INSERT Customers VALUES("2","M","Joe", "Owner", "Ave. 231","Vancouver" ,NULL,"05023", "Mexico", "(222) 222-3332",NULL)
4> INSERT Customers VALUES("3","H","Thomas", "Sales", "Sq. 111","London" ,NULL,"1D00P", "UK", "(444) 444-4444","(444) 444-4444")
5> INSERT Customers VALUES("4","B","Berg", "Order", "Blv 8","Toronto" ,NULL,"00222", "Sweden", "4444-55 55 65","5555-55 55 55")
6> INSERT Customers VALUES("5","S","Moos", "Sales", "Fort 57","New York" ,NULL,"68306", "Germany","6666-66666","6666-77777")
7> INSERT Customers VALUES("6","F","Cite", "Manager","24 ","Dalles" ,NULL,"67000", "France", "88.60.15.31","88.60.15.32")
8> INSERT Customers VALUES("7","C","Sommer", "Owner", "Araq, 67","Paris" ,NULL,"28023", "Spain", "(91) 555 22 82","(91) 555 91 99")
9> INSERT Customers VALUES("8","P","Leb", "Owner", "12 ","Beijing" ,NULL,"13008", "France", "91.24.45.40","91.24.45.41")
10> INSERT Customers VALUES("9","D","Elizabeth","Manager","23 Blvd.","Tsawassen","BC", "T2F8M4","Canada", "(604) 555-4729","(604) 555-3745")
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>
2> CREATE VIEW CustomerOrders_vw
3> WITH SCHEMABINDING
4> AS
5> SELECT cu.rupanyName
6> FROM dbo.Customers AS cu
7> GO
1>
2>
3>
4> CREATE TRIGGER trCustomerOrderUpdate ON CustomerOrders_vw
5> INSTEAD OF UPDATE
6> AS
7> BEGIN
8> IF (SELECT COUNT(*) FROM Inserted) > 0
9> BEGIN
10> RAISERROR("No matching Orders. Cannot perform insert",10,1)
11> END
12> END
13> GO
1> drop TRIGGER trCustomerOrderUpdate;
2> drop view CustomerOrders_vw;
3> drop table Customers;
4> GO