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我试着在mysql中端以下语句:mysql如何撤销文件
revoke file on *.* to 'john'@'localhost';
但我得到的错误:
ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'to 'john'@'localhost'' at line 1
什么是REVOKE语句的正确语法?我尝试阅读MySQL文档,但不明白。