SHUTDOWN
        This statement stops the MySQL server. It requires the
        SHUTDOWN privilege.
      
        SHUTDOWN provides an SQL-level
        interface to the same functionality available using the
        mysqladmin shutdown command. A successful
        SHUTDOWN sequence consists of
        checking the privileges, validating the arguments, and sending
        an OK packet to the client. Then the server is shut down.
      
        The
        Com_shutdown
        status variable tracks the number of
        SHUTDOWN statements. Because
        status variables are initialized for each server startup and do
        not persist across restarts, Com_shutdown
        normally has a value of zero, but can be nonzero if
        SHUTDOWN statements were executed
        but failed.
      
        Another way to stop the server is to send it a
        SIGTERM signal, which can be done by
        root or the account that owns the server
        process. SIGTERM enables server shutdown to
        be performed without having to connect to the server. See
        Section 6.10, “Unix Signal Handling in MySQL”.