Default constraint for Datetime

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Dear Friends,

I have table and records in it.
When ever I update any field in table, I want automatically to update 1 particular column.
Eg.- When ever I update employee details,
I want to update datetime column so that i will come to know that on this date and time it is updated.
Can default constraint can do it.
Kindly suggest and guide.

Posted 24-Feb-13 20:51pm

Arunprasath Natarajan

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3 solutions

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S. M. Ahasan Habib · Answer 1 · 2013-02-24T20:54:00

Solution 1

Yes. Default constraints is enough for you. Just assign getdate() as default constraint for your record create/update track datetime column.

Posted 24-Feb-13 20:54pm

S. M. Ahasan Habib

gvprabu · Answer 2 · 2013-02-24T21:40:00

Solution 2

Hi,

Try like this

SQL

ALTER TABLE Customers ADD CONSTRAINT DF_Customers_updDate 
DEFAULT GETDATE() FOR updDate

Regards,
GVPrabu

Posted 24-Feb-13 21:40pm

gvprabu

Comments

Arunprasath Natarajan 25-Feb-13 5:25am

It does not work.

gvprabu 25-Feb-13 5:28am

If any Records have NULL in your table..?

Arunprasath Natarajan 25-Feb-13 12:16pm

Yes, My Datetime column is NULL. When it is null it wont work?

gvprabu 26-Feb-13 3:31am

So you have to Update Some Default value for All NULL Values. Then Make that column as NOT NULL and try this.

MalwareTrojan · Answer 3 · 2013-02-24T23:12:00

Solution 3

If Solution 1 and 2 dont works then try doing following things.

Every Time you Insert or Update write function "GetDate()" with the respective column.

Posted 24-Feb-13 23:12pm

MalwareTrojan

Comments

Arunprasath Natarajan 25-Feb-13 12:27pm

But it works when Insert query is executed.

MalwareTrojan 25-Feb-13 23:33pm

it ll also work with UPDATE TableName Set Col_Name=GetDate() Where Cond.