触发器
USE test;
CREATE TABLE IF NOT EXISTS student
(
username VARCHAR(20),
PASSWORD VARCHAR(20),
stuid INT AUTO_INCREMENT PRIMARY KEY,
birthday DATE
);
DROP TABLE student;
SELECT * FROM student;
#创建学生表
INSERT INTO student(username,PASSWORD,stuid,birthday)VALUE
("王五",111111,1,"2016-08-23"),
("李四",123456,2,"2016-07-23"),
("杨三",123456,3,"2016-08-17"),
("刘五",100001,4,"2016-08-18"),
("黄六",666666,5,"2016-08-23");
#创建成绩表
CREATE TABLE IF NOT EXISTS cj
(
num INT,
stu_id INT,
stu_name VARCHAR(50),
math FLOAT,
chinese FLOAT,
english FLOAT
);
#触发器
CREATE TRIGGER ins_stu
AFTER INSERT ON student FOR EACH ROW
INSERT INTO cj(num,stu_id,stu_name,math,chinese,english)
VALUES(1,new.stuid,new.username,88,88,88);
#执行触发
INSERT INTO student(username,PASSWORD,birthday)VALUE
('张三','22222','2016-08-23');
存储过程
USE test;
#c创建存储过程
DELIMITER $;
CREATE PROCEDURE testa()
BEGIN
SELECT * FROM student;
SELECT * FROM cj;
END $
DELIMITER ;
#调用存储过程
CALL testa();
#创建存储过程
DELIMITER $
CREATE PROCEDURE test2()
BEGIN
#声明变量类型
DECLARE un VARCHAR(32) DEFAULT '';
#给username变量赋值
SET un='xiaoxiao';
#将查询结果赋值给un变量
SELECT username INTO un FROM student WHERE stuid =3;
#查询un变量,返回
SELECT un;
END $
DELIMITER ;
#调用存储过程
CALL test2();
#创建存储过程
DELIMITER $
CREATE PROCEDURE test3()
BEGIN
BEGIN
#声明变量类型
DECLARE un VARCHAR(32) DEFAULT '';
#给username变量赋值
SET un='xiaoxiao';
#将查询结果赋值给un变量
SELECT username INTO un FROM student WHERE stuid =3;
#查询un变量,返回
SELECT un;
END;
BEGIN
#声明变量类型
DECLARE un VARCHAR(32) DEFAULT '';
#给username变量赋值
SET un='xiaoxiao';
#将查询结果赋值给un变量
SELECT username INTO un FROM student WHERE stuid =4;
#查询un变量,返回
SELECT un;
END;
END $
DELIMITER ;
#调用存储过程
CALL test3();
回滚
USE test;
#创建数据库
CREATE TABLE r_t_t(id INT(5));
SELECT * FROM r_t_t;
#开启事务
BEGIN;
#插入数据
INSERT INTO r_t_t(id) VALUE(5);
INSERT INTO r_t_t(id) VALUE(6);
#提交事务
COMMIT;
#开启事务
BEGIN;
#插入数据
INSERT INTO r_t_t(id) VALUE('abc');
INSERT INTO r_t_t(id) VALUE(8);
#提交事务
ROLLBACK;
