Answers for "mysql delete table if exist"

drop table if it exists mysql

DROP TABLE IF EXISTS <TABLE NAME>;

Posted by: Guest on May-10-2021

mysql delete if not in another table

DELETE FROM BLOB 
 WHERE NOT EXISTS(SELECT NULL
                    FROM FILES f
                   WHERE f.id = fileid)

Posted by: Guest on June-14-2020

mysql delete if not in another table

DELETE b FROM BLOB b 
  LEFT JOIN FILES f ON f.id = b.fileid 
      WHERE f.id IS NULL

Posted by: Guest on June-14-2020

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