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Something like this perhaps:<br />
<br />
<br />
CREATE TRIGGER trg_MyTrigger On YourTableName<br />
<br />
For INSERT, UPDATE<br />
<br />
As<br />
<br />
Update &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;YourTableName<br />
Set [WEEK] = DATEPART(week, CONTACTDATE)<br />
From &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;YourTableName t<br />
&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Inner Join Inserted i On t.YourPrimaryKeyHere = i.YourPrimaryKeyHere
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Something like this perhaps:


CREATE TRIGGER trg_MyTrigger On YourTableName

For INSERT, UPDATE

As

Update      YourTableName
Set [WEEK] = DATEPART(week, CONTACTDATE)
From      YourTableName t
       Inner Join Inserted i On t.YourPrimaryKeyHere = i.YourPrimaryKeyHere

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Thanks to both of you, but I found that the calculation idea worked best. A big thanks to Imthiyaz_ph for the quick and extremely simple answer.
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Thanks to both of you, but I found that the calculation idea worked best. A big thanks to Imthiyaz_ph for the quick and extremely simple answer.

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&gt;&gt;Wouldnt the above trigger fire recursively? &lt;&lt;<br />
By default Recursive triggers are off.
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>>Wouldnt the above trigger fire recursively? <<
By default Recursive triggers are off.

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Sorry acperkins, i forgot abt that option. Thank u.
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Sorry acperkins, i forgot abt that option. Thank u.

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&gt;&gt;Sorry acperkins, i forgot abt that option. Thank u.&lt;&lt;<br />
No problem. &nbsp;And you are absolutely correct about being cautious.
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>>Sorry acperkins, i forgot abt that option. Thank u.<<
No problem.  And you are absolutely correct about being cautious.

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How can I write a trigger to take the datetime object in one field - ie CONTACTDATE - and calculate the week of that date and update the field WEEK with the weeknumber of that date? I think it will use DATEPART(ww, contactdate) or something like that? I really don't know sql very well. 
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How can I write a trigger to take the datetime object in one field - ie CONTACTDATE - and calculate the week of that date and update the field WEEK with the weeknumber of that date? I think it will use DATEPART(ww, contactdate) or something like that? I really don't know sql very well. 

DATEPART and TRIGGER to post WEEK NUMBER

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