mysql 用户/密码/权限操作

由于最近使用mysql遇到了修改用户密码的问题，所以一块学习了一下关于用户的相关操作；

1. 创建新账户

CREATE USER 'jeffrey'@'localhost';

　　

2. 账户设置密码

#当前用户设置密码
SET PASSWORD = PASSWORD('mypass');

#给指定账户设置密码
SET PASSWORD FOR 'jeffrey'@'localhost' = PASSWORD('mypass');

3. 给账户赋权限

#赋权限
GRANT ALL ON db1.* TO 'jeffrey'@'localhost';

#刷新权限
flush privileges;

　　

　　刷新权限的方式有多种，如上只是其中的一种方式。详情点击 或 如下：

　　　可赋值的权限如下表：

Table 13.3 Permissible Privileges for GRANT and REVOKE

Privilege	Meaning and Grantable Levels
ALL [PRIVILEGES]	Grant all privileges at specified access level except GRANT OPTION and PROXY.
ALTER	Enable use of ALTER TABLE. Levels: Global, database, table.
ALTER ROUTINE	Enable stored routines to be altered or dropped. Levels: Global, database, procedure.
CREATE	Enable database and table creation. Levels: Global, database, table.
CREATE ROUTINE	Enable stored routine creation. Levels: Global, database.
CREATE TABLESPACE	Enable tablespaces and log file groups to be created, altered, or dropped. Level: Global.
CREATE TEMPORARY TABLES	Enable use of CREATE TEMPORARY TABLE. Levels: Global, database.
CREATE USER	Enable use of CREATE USER, DROP USER, RENAME USER, and REVOKE ALL PRIVILEGES. Level: Global.
CREATE VIEW	Enable views to be created or altered. Levels: Global, database, table.
DELETE	Enable use of DELETE. Level: Global, database, table.
DROP	Enable databases, tables, and views to be dropped. Levels: Global, database, table.
EVENT	Enable use of events for the Event Scheduler. Levels: Global, database.
EXECUTE	Enable the user to execute stored routines. Levels: Global, database, table.
FILE	Enable the user to cause the server to read or write files. Level: Global.
GRANT OPTION	Enable privileges to be granted to or removed from other accounts. Levels: Global, database, table, procedure, proxy.
INDEX	Enable indexes to be created or dropped. Levels: Global, database, table.
INSERT	Enable use of INSERT. Levels: Global, database, table, column.
LOCK TABLES	Enable use of LOCK TABLES on tables for which you have the SELECT privilege. Levels: Global, database.
PROCESS	Enable the user to see all processes with SHOW PROCESSLIST. Level: Global.
PROXY	Enable user proxying. Level: From user to user.
REFERENCES	Enable foreign key creation. Levels: Global, database, table, column.
RELOAD	Enable use of FLUSH operations. Level: Global.
REPLICATION CLIENT	Enable the user to ask where master or slave servers are. Level: Global.
REPLICATION SLAVE	Enable replication slaves to read binary log events from the master. Level: Global.
SELECT	Enable use of SELECT. Levels: Global, database, table, column.
SHOW DATABASES	Enable SHOW DATABASES to show all databases. Level: Global.
SHOW VIEW	Enable use of SHOW CREATE VIEW. Levels: Global, database, table.
SHUTDOWN	Enable use of mysqladmin shutdown. Level: Global.
SUPER	Enable use of other administrative operations such as CHANGE MASTER TO, KILL, PURGE BINARY LOGS, SET GLOBAL, and mysqladmin debug command. Level: Global.
TRIGGER	Enable trigger operations. Levels: Global, database, table.
UPDATE	Enable use of UPDATE. Levels: Global, database, table, column.
USAGE	Synonym for “no privileges”

 4. 常用mysql命令

#查看当前用户
select current_user;
select current_user();

#格式化输出结果 字符/G 代表格式化输出
select * from t where t.id = 1/G;

5. 参考链接

　　1.  https://dev.mysql.com/doc/refman/5.6/en/set-password.html

　　2. https://dev.mysql.com/doc/refman/5.7/en/create-user.html#create-user-previous

　　3. https://dev.mysql.com/doc/refman/5.6/en/grant.html

　　4. https://dev.mysql.com/doc/refman/5.7/en/privilege-changes.html