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Asked: 2026-05-17T02:45:29+00:00

all! I have Postgresql and query SELECT complex_expression() FROM t WHERE complex_expression() != ”;

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all! I have Postgresql and query


SELECT
  complex_expression()
FROM
  t
WHERE
  complex_expression() != '';

Is there a way to write complex_expression() only once in query and then refer to it? Thanx in advance

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1 Answer

  1. Editorial Team
    select * from
( 
SELECT complex_expression() ce
FROM t
)
where ce != '';
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