MySQL用户管理语句001

　　创建一个dumper用户它只能通过本机的回环网卡连接到mysql数据库

create user dumper@‘127.0.0.1‘ identified by ‘123@456‘;

3、grant 语句用来授权、权限是分层级的通常来说有实例级，数据库级，表级，列级;如果一用户有实例级别的select 权限，自然它也就有了数据库级，表级，列级的权限。

GRANT
    priv_type [(column_list)]
      [, priv_type [(column_list)]] ...
    ON [object_type] priv_level
    TO user_specification [, user_specification] ...
    [REQUIRE {NONE | tsl_option [[AND] tsl_option] ...}]
    [WITH {GRANT OPTION | resource_option} ...]

GRANT PROXY ON user_specification
    TO user_specification [, user_specification] ...
    [WITH GRANT OPTION]

object_type: {
    TABLE
  | FUNCTION
  | PROCEDURE
}

priv_level: {
    *
  | *.*
  | db_name.*
  | db_name.tbl_name
  | tbl_name
  | db_name.routine_name
}

user_specification:
    user [ auth_option ]

auth_option: {
    IDENTIFIED BY ‘auth_string‘
  | IDENTIFIED BY PASSWORD ‘hash_string‘
  | IDENTIFIED WITH auth_plugin
  | IDENTIFIED WITH auth_plugin AS ‘hash_string‘
}

tsl_option: {
    SSL
  | X509
  | CIPHER ‘cipher‘
  | ISSUER ‘issuer‘
  | SUBJECT ‘subject‘
}

resource_option: {
  | MAX_QUERIES_PER_HOUR count
  | MAX_UPDATES_PER_HOUR count
  | MAX_CONNECTIONS_PER_HOUR count
  | MAX_USER_CONNECTIONS count
}

授予一个用户所有权限：

这里有几个地方是要注意的

　　1、all 权限并不包涵grant option 权限。

　　2、all 权限也不包涵proxy 权限，并且proxy 的权限的层级是user级的

grant all on *.* to dumper@‘127.0.0.1‘;
grant grant option on *.* to dumper@‘127.0.0.1‘;
grant proxy on ‘root‘@‘localhost‘ to dumper@‘127.0.0.1‘;

MySQL用户管理语句001

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