Re: Help with SQL statement

Peter Kirk wrote:
>
> Hi there
>
> I am *very* inexperienced with sql, and I am trying to write a statement to
> select certain rows from one table, given that no corresponding row exists
> in another table.
>
> That is, I have TableA, and TableB.
>
> TableA has these columns of interest:
> barcode;
> description;
>
> TableB has these columns of interest
> barcode;
> description;
>
> I want to find all "barcodes" that are in TableA, but not in TableB. How can
> I do this is a single sql statement?
>
> I am experimenting with "outer join" at the moment, but I'm not sure if this
> is entirely correct, and I can't seem to find the correct syntax.
>
> Thanks for any help,
> Peter.

select A.barcode from TableA A, TableB B where B.barcode =* A.barcode
and B.barcode is null

not tested

Norbert Received on Mon Oct 16 2000 - 07:58:54 CDT