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Create Trigger help

Author

Topic

EugeneLim11
Posting Yak Master

167 Posts

Posted - 2008-12-17 : 23:37:11

Hi Experts,

I need a bit of help on Triggers.

I got a table named Attendance, with a column named Day (this is a numberic value), and another column name Status (this is a char) and will be either 0 or L. The unique identifier is studentID (another column).

Now when I insert the values 0 or L into the 'Status' column for a new record, I want to a trigger to fire and add in value 0.25 the 'Day' column if the value of status column is 'L' and (0.5) in the 'Day' column if the value of status column is '0'

Create Trigger Tri_InsertDayCount
on AttendanceTable
AFTER INSERT
AS
BEGIN
Insert into AttendanceTable ([day]) values ('0.25') where xx
Insert into AttendanceTable ([day]) Values ('0.50') where xx
END
GO

The problem I am facing is that I am not sure how to retrieve the inserted value of Status column, as indicated by xx.

Help is very much appreciated. Thank you

Regards,

Eugene

check out my blog at http://www.aquariumlore.blogspot.com

visakh16
Very Important crosS Applying yaK Herder

52326 Posts

Posted - 2008-12-17 : 23:44:34

[code]
Create Trigger Tri_InsertDayCount
on AttendanceTable
AFTER INSERT
AS
BEGIN
UPDATE t
SET t.Day=CASE WHEN t.Status ='0' THEN 0.5 ELSE 0.25 END
FROM AttendanceTable t
INNER JOIN INSERTED i
ON i.studentID=t.studentID
END
GO
[/code]

EugeneLim11
Posting Yak Master

167 Posts

Posted - 2008-12-18 : 01:27:41

Visakh16,

Thank you. this resolve the problem perfectly. :)

The table I need to get data from is Inserted table.

Regards,

Eugene

check out my blog at http://www.aquariumlore.blogspot.com

visakh16
Very Important crosS Applying yaK Herder

52326 Posts

Posted - 2008-12-18 : 01:39:29

welcome

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