增加数据：INSERT INTO table_name (column1, column2, column3, ...) VALUES (value1, value2, value3, ...);

删除数据：DELETE FROM table_name WHERE condition;

修改数据：UPDATE table_name SET column1 = value1, column2 = value2, ... WHERE condition;

查询数据：SELECT column1, column2, ... FROM table_name WHERE condition;

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