mysql7筆記----存儲過程實例

mysql建立存儲過程

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

END;

---

mysql 存儲過程有參數輸入拼接

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存儲過程含輸入參數的拼接的分頁 

 DROP PROCEDURE IF EXISTS getTest01;
DELIMITER $$ 
CREATE PROCEDURE `getTest01`(
  startPage INT,/*第startPage頁，從0開始算*/
  pageSize INT,/*每頁顯示的記錄數*/
  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);