>Another question is how do I do when I want to compare two tables,
>normally is it no problem to get a list with rows that exist i both
>tables, but how do I do if I want to to have the diffrence listed
>instead, the rows that only appears in one of the tables?
LEFT JOIN tblB ON tblA.key=tblB.key
WHERE tblB.key IS NULL;
returns the rows of tblA for which there is no tblB row with a matching key value.
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