sql server null datetime field problem

Question

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SQL-Server-2005

Dear friends,

i have been trying to check in a datetime field in sql sever 2005 express whether this field is null. I tried various combination like-

"SELECT UserID FROM dbo.tblLogIn WHERE LogoutTime="

"SELECT UserID FROM dbo.tblLogIn WHERE LogoutTime="""

"SELECT UserID FROM dbo.tblLogIn WHERE LogoutTime=" & dbnull.value & ""

and many more..

but getting no result.

any idea?

SKPaul

Posted 26-May-11 2:27am

Saumitra Kumar Paul

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2 solutions

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Kim Togo · Accepted Answer · 2011-05-26T02:48:00

Solution 2

SQL

SELECT UserID FROM dbo.tblLogIn WHERE LogoutTime IS NULL

Posted 26-May-11 2:48am

Kim Togo

Updated 26-May-11 2:52am

v3

Comments

Simon_Whale 26-May-11 8:50am

you have to do a "is null" when comparing null values else it wont return anything in sql server.

Kim Togo 26-May-11 8:51am

Thanks :-)

Simon_Whale · Accepted Answer · 2011-05-26T02:44:00

Solution 1

try

SQL

SELECT UserId FROM dbotblLogin WHERE LogoutTime is null

Posted 26-May-11 2:44am

Simon_Whale

Comments

Saumitra Kumar Paul 26-May-11 8:46am

WoW, it works, Thanks a lot.

Simon_Whale 26-May-11 8:47am

your welcome :)