Auto Increment Through Trigger.. Below Table And Trigger Work Fine When I Insert Data Up To Nine Row When I Insert Another Row I Will Give Error And Insert On Second Row Of Table ..I Need Help

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CREATE TABLE [dbo].[Employee1](
[id] CHAR(10) PRIMARY KEY,
[name] VARCHAR(50),
[address] varchar(50)
)
GO
CREATE TRIGGER AutoIncrement_Trigger ON [dbo].[Employee1]
instead OF INSERT AS
BEGIN

DECLARE @num INT
SELECT @num=ISNULL(MAX(id),0)+1 FROM [dbo].[Employee1]

INSERT INTO [dbo].[Employee1] (id,name,address) SELECT (@num),
name=i.name,
address =i.address
from inserted i
END

SQL

INSERT INTO [dbo].[Employee1] (name,address) VALUES('a','aaa')
INSERT INTO [dbo].[Employee1] (name,address) VALUES('Aslam','pakistan')
INSERT INTO [dbo].[Employee1] (name,address) VALUES('ali','hindustan')
INSERT INTO [dbo].[Employee1] (name,address) VALUES('shah','iran')
INSERT INTO [dbo].[Employee1] (name,address) VALUES('azeem','nipal')
INSERT INTO [dbo].[Employee1] (name,address) VALUES('asad','sirlandka')
INSERT INTO [dbo].[Employee1] (name,address) VALUES('amir','karachi')
INSERT INTO [dbo].[Employee1] (name,address) VALUES('arif','lahore')
INSERT INTO [dbo].[Employee1] (name,address) VALUES('Raja','islamabad')

Posted 4-May-14 20:21pm

sibtain shah

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King Fisher 7-May-14 3:18am

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Darshan.Pa · Answer 1 · 2014-05-04T20:33:00

Instead of doing this you can use simple way to create table.

SQL

CREATE TABLE [dbo].[Employee1](
[id] int  PRIMARY KEY identity(1,1),
[name] VARCHAR(50),
[address] varchar(50)
)
GO

and you can insert data like this..

Need not to create trigger..

your ID colomn will be incremented by 1 automatically

SQL

INSERT INTO [dbo].[Employee1] (name,address) VALUES('a','aaa')
INSERT INTO [dbo].[Employee1] (name,address) VALUES('Aslam','pakistan')
INSERT INTO [dbo].[Employee1] (name,address) VALUES('ali','hindustan')
INSERT INTO [dbo].[Employee1] (name,address) VALUES('shah','iran')
INSERT INTO [dbo].[Employee1] (name,address) VALUES('azeem','nipal')
INSERT INTO [dbo].[Employee1] (name,address) VALUES('asad','sirlandka')
INSERT INTO [dbo].[Employee1] (name,address) VALUES('amir','karachi')
INSERT INTO [dbo].[Employee1] (name,address) VALUES('arif','lahore')
INSERT INTO [dbo].[Employee1] (name,address) VALUES('Raja','islamabad')