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Complex view table 
A view table (see
CREATE VIEW statement) is a complex view table if it satisfies one of the following conditions:
- The definition of the view table contains DISTINCT or GROUP BY or HAVING.
- The CREATE VIEW statement contains EXCEPT, INTERSECT, or UNION.
- The
search condition in the QUERY expression of the CREATE VIEW statement contains a subquery.
The CREATE VIEW statement contains an outer join, that is an OUTER JOIN indicator in a JOIN predicate of the search condition.
