Trigger for delete using deleted table : Deleted table « Trigger « SQL Server / T-SQL Tutorial

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SQL Server / T-SQL Tutorial » Trigger » Deleted table 
22.14.1.Trigger for delete using deleted table
5CREATE TABLE OrderDetails(
6> ID       int NOT NULL,
7> PartID   int NOT NULL,
8> Quantity int NOT NULL);
9> GO
1>
2INSERT INTO OrderDetails VALUES(100011112)
3INSERT INTO OrderDetails VALUES(100014210)
4INSERT INTO OrderDetails VALUES(10001725)
5INSERT INTO OrderDetails VALUES(10002149)
6INSERT INTO OrderDetails VALUES(100025140)
7INSERT INTO OrderDetails VALUES(100034110)
8INSERT INTO OrderDetails VALUES(100036135)
9INSERT INTO OrderDetails VALUES(100036515)
10> GO

(rows affected)

(rows affected)

(rows affected)

(rows affected)

(rows affected)

(rows affected)

(rows affected)

(rows affected)
1>
2>
3CREATE TABLE Employees
4(orderid int NOT NULL,
5>  mgrid int NULL,
6>  empname varchar(25NOT NULL,
7>  salary money NOT NULL);
8> GO
1>
2>
3CREATE TRIGGER myTrigger ON Employees FOR DELETE
4> AS
5> IF EXISTS(SELECT *
6>           FROM
7>               OrderDetails AS OD
8>             JOIN
9>               deleted      AS D ON OD.id = D.orderid)
10BEGIN
11>   RAISERROR('The Employee you are trying to delete have related rows
12~             in OrderDetails.  TRANSACTION rolled back.', 101)
13>   ROLLBACK TRANSACTION
14END
15> GO
1>
2> drop table OrderDetails;
3> GO
1>
2>
22.14.Deleted table
22.14.1.Trigger for delete using deleted table
22.14.2.count for DELETED
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