-- 创建用户CREATE USER 'dongrichtest' IDENTIFIED BY 'dongrichtest';-- 新增后删除需要刷新权限FLUSH PRIVILEGES;-- 删除用户DELETE FROM USER WHERE USER="user_name" AND HOST="hostname";-- 用户授权(增删改查权限)GRANT PRIVILEGES ON databasename.tablename TO 'username'@'host';-- GRANT SELECT, INSERT ON databasename.tablename TO 'username'@'host';GRANT ALL ON dongrichtest.* TO 'dongrichtest'@'%';-- 设置密码SET PASSWORD FOR 'dongrichtest'@'%' = PASSWORD('dongrichtest');-- 撤销用户权限REVOKE privilege ON databasename.tablename FROM 'username'@'host';REVOKE SELECT ON *.* FROM 'username'@'%';-- 移除用户DROP USER 'username'@'host';/**    ALTER Allows use of ALTER TABLE.    ALTER ROUTINE Alters or drops stored routines.    CREATE Allows use of CREATE TABLE.    CREATE ROUTINE Creates stored routines.    CREATE TEMPORARY TABLE Allows use of CREATE TEMPORARY TABLE.    CREATE USER Allows use of CREATE USER, DROP USER, RENAME USER, and REVOKE ALL PRIVILEGES.    CREATE VIEW Allows use of CREATE VIEW.    DELETE Allows use of DELETE.    DROP Allows use of DROP TABLE.    EXECUTE Allows the user to run stored routines.    FILE Allows use of SELECT... INTO OUTFILE and LOAD DATA INFILE.    INDEX Allows use of CREATE INDEX and DROP INDEX.    INSERT Allows use of INSERT.    LOCK TABLES Allows use of LOCK TABLES on tables for which the user also has SELECT privileges.    PROCESS Allows use of SHOW FULL PROCESSLIST.    RELOAD Allows use of FLUSH.    REPLICATION Allows the user to ask where slave or master    CLIENT servers are.    REPLICATION SLAVE Needed for replication slaves.    SELECT Allows use of SELECT.    SHOW DATABASES Allows use of SHOW DATABASES.    SHOW VIEW Allows use of SHOW CREATE VIEW.    SHUTDOWN Allows use of mysqladmin shutdown.    SUPER Allows use of CHANGE MASTER, KILL, PURGE MASTER LOGS, and SET GLOBAL SQL statements. Allows mysqladmin debug command. Allows one extra connection to be made if maximum connections are reached.    UPDATE Allows use of UPDATE.    USAGE Allows connection without any specific privileges.*/