Question : Full Outer join in Sybase

Hi all,
 I need to match the a/c code from A and B tables and get the difference, but either table could have the code. Normally I would use a full outer join but this isn't supported in Sybase ASE.  Any other ideas?

Many thanks,
Caoimhe

Answer : Full Outer join in Sybase

UNION a left outer join and a right outer join?