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PostgreSQL
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42.5. Basic Statements
As explained previously, the expression in such a statement is evaluated by means of an SQL SELECT command sent to the main database engine. The expression must yield a single value (possibly a row ...
PostgreSQL
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39.7. Cursors
DECLARE curs1 refcursor; curs2 CURSOR FOR SELECT * FROM tenk1; curs3 CURSOR (key integer) IS SELECT * FROM tenk1 WHERE unique1 = key; ...
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