DOexpr[,expr] ...
      DO executes the expressions but
      does not return any results. In most respects,
      DO is shorthand for SELECT
      , but has the
      advantage that it is slightly faster when you do not care about
      the result.
    expr, ...
      DO is useful primarily with
      functions that have side effects, such as
      RELEASE_LOCK().
    
      DO was added in MySQL 3.23.47.
    


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