Help with SELECT statement

Hi,
I have two tables with a UserID column and need to construct a query that
lists all UserIDs from Table A that is not present in Table B.
Any help with this select statement would be appreciated
NiclasSelect A.* from TableA as A where Not Exists (select * from TableB as B
where B.UserId = A.UserId)
You can also go with a Left Outer Join but it's a little more complicated to
understand:
Select A.* from TableA as A Left Outer Join TableB as B on A.UserId =
B.UserId
Where B.UserId is Null
Sylvain Lafontaine, ing.
MVP - Technologies Virtual-PC
E-mail: http://cerbermail.com/?QugbLEWINF
"Niclas" <lindblom_niclas@.hotmail.com> wrote in message
news:eipps755FHA.4076@.tk2msftngp13.phx.gbl...
> Hi,
> I have two tables with a UserID column and need to construct a query that
> lists all UserIDs from Table A that is not present in Table B.
> Any help with this select statement would be appreciated
> Niclas
>|||A third possibility would be to use the IN clause:
Select A.* from TableA as A where A.UserId Not IN (select UserId from TableB
Where UserId is not Null)
The condition Where B.UserId is Not Null is a necessity if there is a
possibility that B.UserId can be Null; otherwise the result won't be good if
the IN clause encounter a Null value.
Sylvain Lafontaine, ing.
MVP - Technologies Virtual-PC
E-mail: http://cerbermail.com/?QugbLEWINF
"Niclas" <lindblom_niclas@.hotmail.com> wrote in message
news:eipps755FHA.4076@.tk2msftngp13.phx.gbl...
> Hi,
> I have two tables with a UserID column and need to construct a query that
> lists all UserIDs from Table A that is not present in Table B.
> Any help with this select statement would be appreciated
> Niclas
>|||Many thanks !
Niclas
"Sylvain Lafontaine" <sylvain aei ca (fill the blanks, no spam please)>
wrote in message news:emU3YG65FHA.2888@.tk2msftngp13.phx.gbl...
>A third possibility would be to use the IN clause:
> Select A.* from TableA as A where A.UserId Not IN (select UserId from
> TableB Where UserId is not Null)
> The condition Where B.UserId is Not Null is a necessity if there is a
> possibility that B.UserId can be Null; otherwise the result won't be good
> if the IN clause encounter a Null value.
> --
> Sylvain Lafontaine, ing.
> MVP - Technologies Virtual-PC
> E-mail: http://cerbermail.com/?QugbLEWINF
>
> "Niclas" <lindblom_niclas@.hotmail.com> wrote in message
> news:eipps755FHA.4076@.tk2msftngp13.phx.gbl...
>