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Cardinality and outer join

what is the best way to join the below.. FULL Outer or LEFT Outer?

Each TableB has Zero or more TableA (Outer Join) (Cardinality 0..n)
Each tableA has one more tableB (Cardinality 1..n)
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Sean Stuber

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OK.. what is the significance of (Cardinality 0..n) vs (Cardinality 1..n)
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ASKER

thanks