MySQL帳號權限

mysql權限分爲全局權限、庫權限、表權限，對應於mysql庫裏面的user表、db表、tables_priv表。

grant all privileges on *.*  :操做mysql.user表

grant all privileges on db.*  :操做mysql.db表

grant all privileges on db.table :操做mysql.tables_priv表

這三種操做分別對應不一樣的表，互不影響，賦予一個用戶大粒度的權限，並不能收回小粒度的權限。

示例以下：

root@localhost:mysql3306.sock  14:02:  [test]>grant all privileges on *.* to test@'127.0.0.1';   

Query OK, 0 rows affected (0.00 sec)

root@localhost:mysql3306.sock  14:03:  [test]>revoke update on test.* from  test@'127.0.0.1';      

ERROR 1141 (42000): There is no such grant defined for user 'test' on host '127.0.0.1'

root@localhost:mysql3306.sock  14:03:  [test]>revoke update on test.a from  test@'127.0.0.1'; 

ERROR 1147 (42000): There is no such grant defined for user 'test' on host '127.0.0.1' on table 'a'