Access denied; you need (at least one of) the RELOAD privilege(s) for this operation

1. reload 是 administrative 級的權限，即 server administration；這類權限包括： CREATE USER, PROCESS, RELOAD, REPLICATION CLIENT, REPLICATION SLAVE, SHOW DATABASES, SHUTDOWN, SUPER 2. 這類權限的受權不是針對某個數據庫的，所以須使用on *.

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