mysql：用户管理、索引、视图、函数、存储过程

#创建一个用户并设置密码，注意IP地址要是登录mysql电脑的IP地址

USE mysql

CREATE USER lisi@'192.168.149.1' IDENTIFIED BY "111111"

CREATE USER lisi1@'192.168.149.10' IDENTIFIED BY "111111"

SELECT * FROM USER

#删除一个用户

DROP USER zhangsan@"192.168.149.1"

DROP USER lisi1@"192.168.149.10"

DELETE FROM USER WHERE USER="lisi1"

SELECT * FROM USER

#修改密码

UPDATE USER SET PASSWORD=PASSWORD("123456") WHERE USER="lisi"

#使新密码立即生效

FLUSH PRIVILEGES

#给lisi@"192.168.149.1"授权能查询test1数据库中的table1表的id属性

GRANT SELECT(id) ON test1.table1 TO "lisi"@"192.168.149.1" IDENTIFIED BY "123456"

#查看lisi@"192.168.149.1"的权限

SHOW GRANTS FOR lisi@"192.168.149.1"

#给lisi@"192.168.149.1"授权，让它能查询整个table1表的所有属性

GRANT SELECT ON test1.table1 TO "lisi"@"192.168.149.1" IDENTIFIED BY "123456"

#查看lisi@"192.168.149.1"的权限

SHOW GRANTS FOR lisi@"192.168.149.1"

#给lisi@"192.168.149.1"授权，让它能够查询test1数据库中的所有表的所有属性

GRANT SELECT ON test1.* TO "lisi"@"192.168.149.1"  IDENTIFIED BY "123456"

#查看lisi@"192.168.149.1"的权限

SHOW GRANTS FOR lisi@"192.168.149.1"

#权限没起作时，请刷新权限,如果还是不行，只能重新登录一次

FLUSH PRIVILEGES

#取消权限 ，取消对test1数据库所有表的查询权限

REVOKE SELECT ON test1.* FROM "lisi"@"192.168.149.1"    #此时，只能看到test1中的table1数据表了，看不到table2

#查看lisi@"192.168.149.1"的权限

SHOW GRANTS FOR lisi@"192.168.149.1"

#取消权限，取消对test1数据库table1中所有属性的查询权限

REVOKE SELECT ON test1.table1 FROM "lisi"@"192.168.149.1"

#查看lisi@"192.168.149.1"的权限

SHOW GRANTS FOR lisi@"192.168.149.1"

#取消权限,取消对test1数据库table1中id的查询权限

REVOKE SELECT(id) ON test1.table1 FROM "lisi"@"192.168.149.1"

#给lisi@"192.168.149.1"授权能查询test1数据库中的table1表的id和name属性

GRANT SELECT(id,NAME) ON test1.table1 TO "lisi"@"192.168.149.1" IDENTIFIED BY "123456"

#查看lisi@"192.168.149.1"的权限

SHOW GRANTS FOR lisi@"192.168.149.1"

#取消权限,取消对test1数据库table1中id的查询权限

REVOKE SELECT(id) ON test1.table1 FROM "lisi"@"192.168.149.1"   #此时lisi只能查询table1表中的name属性了，不能查询id属性了

#在定义了主键的表上，查看索引

SHOW INDEX FROM dept

#在没有定义主键的表上，查看索引

USE test1

SHOW INDEX FROM table1

#定义索引，方法1

CREATE INDEX index1 ON table1(id)

#查看索引

SHOW INDEX FROM table1

#定义索引，方法2

ALTER TABLE table2 ADD INDEX index1(id)

#查看索引

SHOW INDEX FROM table2

#定义索引，方法3

CREATE TABLE table3

(

id INT,

NAME VARCHAR(20),

INDEX index1(NAME)

)

#查看索引

SHOW INDEX FROM table3

#在table3上面删除索引

DROP INDEX index1 ON table3

#查看索引

SHOW INDEX FROM table3

#创建视图

CREATE VIEW view1

AS

SELECT * FROM table1

#通过视图查询数据

SELECT * FROM view1

#查看视图

SHOW TABLES

SHOW TABLE STATUS WHERE COMMENT="view"

#修改视图 方法1

ALTER VIEW view1

AS

SELECT * FROM table2

SELECT * FROM view1

SHOW TABLES

#修改视图 方法2

CREATE OR REPLACE VIEW view1

AS

SELECT * FROM table1

SHOW TABLES

SELECT * FROM view1

#通过视图修改原表的属性值

UPDATE view1 SET NAME="tigger" WHERE id=1

SELECT * FROM table1

SELECT * FROM view1

#对原表进行修改，视图中的数据也会修改

DELETE FROM table1 WHERE id=1

SELECT * FROM view1

#通过视图增加一行记录，原表中的记录也会增加

INSERT INTO view1 VALUES(1,"bird")

SELECT * FROM table1

#删除视图

DROP VIEW view1

SHOW TABLES

===================================================================

=========================================================

#查看函数功能的开关是否开启

SHOW VARIABLES LIKE "%func%"

#开启函数功能开关

SET GLOBAL log_bin_trust_function_creators=1

SHOW VARIABLES LIKE "%func%"

#创建函数1，不带函数

#因为sqlyog工具的原因，需要使用定界符，关键字是delimiter 后面定界符，表示程序的开始和结束

DELIMITER &

CREATE FUNCTION      helloworld()

RETURNS VARCHAR(20)

BEGIN

RETURN "hello world!";

END&

DELIMITER

#调用函数

SELECT helloworld() AS hello

#创建函数2，带参数

DELIMITER $$

CREATE FUNCTION getdate(riqi DATETIME)

RETURNS VARCHAR(50)

BEGIN

RETURN DATE_FORMAT(riqi,"%Y年%m月%d日 %h时%i分%s秒");

END$$

DELIMITER

#调用函数

SELECT getdate("2017-07-19 10:40:30")

#删除函数

DROP FUNCTION getdate

#调用函数 2

SELECT NOW()

SELECT getdate(NOW())

#查看所有函数

SHOW FUNCTION STATUS

#查看具体某个函数

SHOW CREATE FUNCTION getdate

SHOW CREATE FUNCTION helloworld

——————————————————————————————————

存储过程：

数据准备：

create database test1 default charactor set utf8 collate utf8_general_ci

create table hr

(

id int,

name varchar(20),

deptno int,

salary int

)engine=innodb default charset=utf8

INSERT INTO hr VALUES(1,"zhangsan",1,2000);

INSERT INTO hr VALUES(2,"lisi",1,2100);

INSERT INTO hr VALUES(3,"小明",2,2500);

INSERT INTO hr VALUES(4,"小红",2,2200);

INSERT INTO hr VALUES(5,"小王",3,1800);

INSERT INTO hr VALUES(6,"小陈",3,1900);

INSERT INTO hr VALUES(7,"小赵",3,3000)

#写一个存储过程，统计部门员工人数

DELIMITER $$

CREATE PROCEDURE proce1(IN dno INT,OUT total_number INT)

BEGIN

SELECT COUNT(id) INTO total_number FROM hr WHERE deptno=dno;

END$$

DELIMITER

#调用存储过程

#测试1部门的员工人数

CALL proce1(1,@test)

SELECT @test AS 人数

SELECT @test

#验证2部门的员工人数

CALL proce1(2,@renshu)

SELECT @renshu AS 人数

#验证3部门的员工人数

CALL proce1(3,@test)

SELECT @test

#验证一个不存在的部门的员工人数

CALL proce1(4,@test)

SELECT @test

#查看数据库中所有的存储过程

SHOW PROCEDURE STATUS

#查看具体某一个存储过程

SHOW CREATE PROCEDURE proce1

#删除一个存储过程

DROP PROCEDURE pro;

DROP PROCEDURE pro1;

DROP PROCEDURE pro2