#授權表
user #該表放行的權限,針對:所有數據,所有庫下所有表,以及表下的所有字段
db #該表放行的權限,針對:某一數據庫,該數據庫下的所有表,以及表下的所有字段
tables_priv #該表放行的權限。針對:某一張表,以及該表下的所有字段
columns_priv #該表放行的權限,針對:某一個字段
#按圖解釋:
user:放行db1,db2及其包含的所有
db:放行db1,及其db1包含的所有
tables_priv:放行db1.table1,及其該表包含的所有
columns_prive:放行db1.table1.column1,只放行該字段
#創建用戶 create user 'egon'@'1.1.1.1' identified by '123'; create user 'egon'@'192.168.1.%' identified by '123'; create user 'egon'@'%' identified by '123'; #授權:對文件夾,對文件,對文件某一字段的權限 查看幫助:help grant 常用權限有:select,update,alter,delete all可以代表除了grant之外的所有權限 #針對所有庫的授權:*.* grant select on *.* to 'egon1'@'localhost' identified by '123'; #只在user表中可以查到egon1用戶的select權限被設置為Y #針對某一數據庫:db1.* grant select on db1.* to 'egon2'@'%' identified by '123'; #只在db表中可以查到egon2用戶的select權限被設置為Y #針對某一個表:db1.t1 grant select on db1.t1 to 'egon3'@'%' identified by '123'; #只在tables_priv表中可以查到egon3用戶的select權限 #針對某一個字段: mysql> select * from t3; +------+-------+------+ | id | name | age | +------+-------+------+ | 1 | egon1 | 18 | | 2 | egon2 | 19 | | 3 | egon3 | 29 | +------+-------+------+ grant select (id,name),update (age) on db1.t3 to 'egon4'@'localhost' identified by '123'; #可以在tables_priv和columns_priv中看到相應的權限 mysql> select * from tables_priv where user='egon4'\G *************************** 1. row *************************** Host: localhost Db: db1 User: egon4 Table_name: t3 Grantor: root@localhost Timestamp: 0000-00-00 00:00:00 Table_priv: Column_priv: Select,Update row in set (0.00 sec) mysql> select * from columns_priv where user='egon4'\G *************************** 1. row *************************** Host: localhost Db: db1 User: egon4 Table_name: t3 Column_name: id Timestamp: 0000-00-00 00:00:00 Column_priv: Select *************************** 2. row *************************** Host: localhost Db: db1 User: egon4 Table_name: t3 Column_name: name Timestamp: 0000-00-00 00:00:00 Column_priv: Select *************************** 3. row *************************** Host: localhost Db: db1 User: egon4 Table_name: t3 Column_name: age Timestamp: 0000-00-00 00:00:00 Column_priv: Update rows in set (0.00 sec) #刪除權限 revoke select on db1.* from 'egon'@'%';