In a previous blog post, we’ve advertised the use of SQL EXISTS rather than COUNT(*) to check for existence of a value in SQL. I.e. to check if in the Sakila database, actors called WAHLBERG have played in any films, instead of: Do this: (Depending on your dialect you may require a FROM DUAL clause, … Continue reading An Efficient Way to Check for Existence of Multiple Values in SQL
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An Efficient Way to Check for Existence of Multiple Values in SQL
An Efficient Way to Check for Existence of Multiple Values in SQL
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