Wednesday, January 18, 2006

NULLs and 3VL!

Missing values (i.e. NULLs) impact on SQL is maybe one of the biggest gotchas in the field of relational databases and Oracle is no exception: Three-valued logic comes from Nothing (and gets you nowhere) and it creeps in everywhere - just to name one sighting see = null in WB_TRUNCATE_TABLE.

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