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Message Posted: Tue, 02 Jan 2007 @ 13:00:58 GMT

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Don't use DISTINCT, because this will result in a heavily skewed spool for a large table.

Better use:

     Select TYPE(Your_col_name) from Your_Table group by 1;

Or even better (without any table access):

     select TYPE(tablename.col_name)

Dieter

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