mysql7笔记----存储过程实例

mysql创建存储过程

DROP PROCEDURE IF EXISTS getCreateTimes
/*前面要写DELIMITER $$ 或DELIMITER // */
DELIMITER $$
CREATE PROCEDURE `getCreateTimes`()
 BEGIN
  SELECT userCreateTime FROM users;

END;

---

mysql 存储过程有参数输入拼接

DROP PROCEDURE IF EXISTS getTest01;
DELIMITER $$
CREATE PROCEDURE `getTest01`(
  uname VARCHAR(50),
  upass VARCHAR(50)
)
 BEGIN
 SET @sql= 'SELECT * FROM users where 1=1';
 IF uname IS NOT NULL THEN
      SET @sql=CONCAT(@sql,' AND userName=',"'",uname,"'");
      END IF;
  IF upass IS NOT NULL THEN
      SET @sql=CONCAT(@sql,' AND password=',"'",upass,"'");
      END IF;
  PREPARE stmt FROM @sql;
   EXECUTE stmt;
END;

CALL getTest01(NULL,"123");

---

mysql存储过程含输入参数的拼接的分页

 DROP PROCEDURE IF EXISTS getTest01;
DELIMITER $$
CREATE PROCEDURE `getTest01`(
  startPage INT,/*第startPage页，从0开始算*/
  pageSize INT,/*每页显示的记录数*/
  uname VARCHAR(50),
  upass VARCHAR(50)
)
 BEGIN
 SET @sql= 'SELECT * FROM users where 1=1';
 IF uname IS NOT NULL THEN
      SET @sql=CONCAT(@sql,' AND userName=',"'",uname,"'");
      END IF;
  IF upass IS NOT NULL THEN
      SET @sql=CONCAT(@sql,' AND password=',"'",upass,"'");
      END IF;
      SET @sql=CONCAT(@sql,' LIMIT ',startPage*pageSize,",",pageSize);
  PREPARE stmt FROM @sql;
   EXECUTE stmt;
END;

CALL getTest01(4,2,NULL,NULL);