mysql中怎么實現定時任務

今天就跟大家聊聊有關mysql中怎么實現定時任務，可能很多人都不太了解，為了讓大家更加了解，小編給大家總結了以下內容，希望大家根據這篇文章可以有所收獲。

定時任務
查看event是否開啟: show variables like '%sche%';
將事件計劃開啟: set global event_scheduler=1;
關閉事件任務: alter event e_test ON COMPLETION PRESERVE DISABLE;
開戶事件任務: alter event e_test ON COMPLETION PRESERVE ENABLE;

簡單實例.
創建表 CREATE TABLE test(endtime DATETIME);

創建存儲過程test
     CREATE PROCEDURE test ()
     BEGIN
          update examinfo SET endtime = now() WHERE id = 14;
     END;

     創建event e_test
     CREATE EVENT if not exists e_test
          on schedule every 30 second
          on completion preserve
     do call test();
CREATE EVENT if not exists e_test
          on schedule every 1 second
          on completion preserve
     do insert into aa values (now());
     每隔30秒將執行存儲過程test,將當前時間更新到examinfo表中id=14的記錄的endtime字段中去.

觸發器
delimiter //
CREATE TRIGGER trigger_htmlcache BEFORE INSERT ON t_model
  FOR EACH ROW BEGIN
    if CURDATE()<NEW.time then
    INSERT INTO t_htmlcache(id,url) value(NEW.id,NEW.url);
    end if;
END;
//
通過建表->Insert的方式測試.

DELIMITER $$
DROP PROCEDURE IF EXISTS `njfyedepartment`.`sp_ireport` $$
CREATE ` PROCEDURE `sp_ireport`(IN qureyType VARCHAR(20),IN daytime VARCHAR(20),IN p_ids VARCHAR(50),IN c_ids VARCHAR(50),IN ct1_ids VARCHAR(50),IN ct2_ids VARCHAR(50),IN ku VARCHAR(50),IN ireport_chart varchar(50))
BEGIN
DECLARE i INT DEFAULT 1;
IF qureyType  = 'insert' OR qureyType  = 'INSERT' THEN
INSERT INTO ireport
(pid,cid,ct1id,ct2id,creatTime,crawlerNumber,WEEK)
SELECT province AS pid,
cityid AS cid,
category1id AS ct1id,
category2id AS ct2id,
(CURRENT_DATE) AS creatTime,COUNT(*) AS crawlerNumber,
(FLOOR(DAYOFMONTH(CURRENT_DATE)/8)+1) AS WEEK
FROM t_model t
WHERE TIME > (CURRENT_DATE-1) AND TIME < (CURRENT_DATE)
AND province IS NOT NULL
AND cityid IS NOT NULL
GROUP BY province,cityid,category1id,category2id;
END IF;
IF qureyType  = 'month' OR qureyType  = 'MONTH' THEN
IF EXISTS(SELECT * FROM information_schema.`TABLES` T WHERE TABLE_NAME = 'tmp_result' AND TABLE_SCHEMA = ku) THEN
DROP TABLE tmp_result;
END IF;
CREATE TABLE tmp_result
(pid VARCHAR(50),pName VARCHAR(50),cid VARCHAR(50),cName VARCHAR(50),ct1id VARCHAR(50),ct1Name VARCHAR(50),
ct2id VARCHAR(50),ct2Name VARCHAR(50),month2 INTEGER,month3 INTEGER,month4 INTEGER,month5 INTEGER,month6 INTEGER,
month7 INTEGER,month7 INTEGER,month8 INTEGER,month9 INTEGER,month20 INTEGER,month21 INTEGER,month22 INTEGER,heji INTEGER);

lable_exit: BEGIN
SET @SqlCmd = ' INSERT INTO tmp_result (pid,pname,cid,cname,ct1id,ct1name,ct2id,ct2name)
SELECT pid,pname,cid,cname,ct1id,ct1name,ct2id,ct2name FROM
(SELECT ia.pid,a.name AS pname,ia.cid,b.name AS cname,ia.ct1id,c.name AS ct1name,ia.ct2id,d.name AS ct2name
FROM ireport ia
LEFT JOIN province a ON ia.pid=a.id
LEFT JOIN city b ON ia.cid=b.id
LEFT JOIN t_category1 c ON ia.ct1id=c.id
LEFT JOIN t_category2 d ON ia.ct2id=d.id
WHERE YEAR(ia.creatTime)=YEAR(?) ';
IF p_ids IS NOT NULL AND p_ids <> '' THEN
SET @SqlCmd = CONCAT(@SqlCmd , 'and ia.pid in (');
SET @SqlCmd = CONCAT(@SqlCmd, p_ids);
SET @SqlCmd = CONCAT(@SqlCmd, ')');
END IF;
IF c_ids IS NOT NULL AND c_ids <> '' THEN
SET @SqlCmd = CONCAT(@SqlCmd , 'and ia.cid in (');
SET @SqlCmd = CONCAT(@SqlCmd, c_ids);
SET @SqlCmd = CONCAT(@SqlCmd, ')');
END IF;
IF ct1_ids IS NOT NULL AND ct1_ids <> '' THEN
SET @SqlCmd = CONCAT(@SqlCmd , 'and ia.ct1id in (');
SET @SqlCmd = CONCAT(@SqlCmd, ct1_ids);
SET @SqlCmd = CONCAT(@SqlCmd, ')');
END IF;
IF ct2_ids IS NOT NULL AND ct2_ids <> '' THEN
SET @SqlCmd = CONCAT(@SqlCmd , 'and ia.ct2id in (');
SET @SqlCmd = CONCAT(@SqlCmd, ct2_ids);
SET @SqlCmd = CONCAT(@SqlCmd, ')');
END IF;
SET @SqlCmd = CONCAT(@SqlCmd , ') AS ir GROUP BY pid,pname,cid,cname,ct1id,ct1name,ct2id,ct2name;');
PREPARE stmt1 FROM @SqlCmd;
SET @a = daytime;
EXECUTE stmt1 USING @a;
DEALLOCATE PREPARE stmt1;
LEAVE lable_exit;
END lable_exit;

WHILE i <= 12 DO
lable_exit: BEGIN
SET @SqlCmd = 'UPDATE tmp_result AS a,
(
SELECT pid,cid,ct1id,ct2id,SUM(crawlerNumber) AS crawlerNumber FROM
(SELECT pid,cid,ct1id,ct2id,crawlerNumber FROM ireport WHERE MONTH(creatTime)=? AND YEAR(creatTime)=YEAR(?)) AS ir
GROUP BY pid,cid,ct1id,ct2id
) AS b
SET a.month';
SET @SqlCmd = CONCAT(@SqlCmd , i);
SET @SqlCmd = CONCAT(@SqlCmd , '=b.crawlerNumber ');
SET @SqlCmd = CONCAT(@SqlCmd , 'WHERE a.pid=b.pid AND a.cid=b.cid AND a.ct1id=b.ct1id AND a.ct2id=b.ct2id; ');
PREPARE stmt1 FROM @SqlCmd;
SET @a = i;
SET @b = daytime;
EXECUTE stmt1 USING @a,@b;
DEALLOCATE PREPARE stmt1;
LEAVE lable_exit;
END lable_exit;
lable_exit: BEGIN
SET @SqlCmd = 'UPDATE tmp_result SET month';
SET @SqlCmd = CONCAT(@SqlCmd , i);
SET @SqlCmd = CONCAT(@SqlCmd , ' = 0 WHERE month');
SET @SqlCmd = CONCAT(@SqlCmd , i);
SET @SqlCmd = CONCAT(@SqlCmd , ' IS NULL');
PREPARE stmt1 FROM @SqlCmd;
EXECUTE stmt1;
DEALLOCATE PREPARE stmt1;
LEAVE lable_exit;
END lable_exit;
SET i = i + 1;
END WHILE;
UPDATE tmp_result SET heji=month2+month3+month4+month5+month6+month7+month7+month8+month9+month20+month21+month22;

INSERT INTO tmp_result (pid,pname,cid,cname,ct1id,ct1name,ct2id,ct2name,month2,month3,month4,month5,month6,month7,month7,month8,month9,month20,month21,month22,heji)
SELECT '' AS pid,'--' AS pname,'' AS cid,'總合計:' AS cname,'' AS ct1id,'--' AS ct1name,'' AS ct2id,'--' AS ct2name,SUM(month2) AS month2,SUM(month3) AS month3,SUM(month4) AS month4,SUM(month5) AS month5,
SUM(month6) AS month6,SUM(month7) AS month7,SUM(month7) AS month7,SUM(month8) AS month8,SUM(month9) AS month9,SUM(month20) AS month20,SUM(month21) AS month21,SUM(month22) AS month22,SUM(heji) AS heji
FROM tmp_result;

IF ireport_chart  = 'report' OR ireport_chart  = 'REPORT' THEN
SELECT pid,pName,cid,cName,ct1id,ct1Name,ct2id,ct2Name,month2,month3,month4,month5,month6,month7,month7,month8,month9,month20,month21,month22,heji FROM tmp_result;
END IF;
IF ireport_chart  = 'chart' OR ireport_chart  = 'CHART' THEN
SELECT '' AS pid,pName,'' AS cid,'' AS cName,'' AS ct1id,'' AS ct1Name,'' AS ct2id,'' AS ct2Name,SUM(month2) as month2,SUM(month3) as month3,SUM(month4) as month4,SUM(month5) as month5,
SUM(month6) as month6,SUM(month7) as month7,SUM(month7) as month7,SUM(month8) as month8,SUM(month9) as month9,SUM(month20) as month20,SUM(month21) as month21,SUM(month22) as month22,'' AS heji
FROM (SELECT pid,pName,cid,cName,ct1id,ct1Name,ct2id,ct2Name,month2,month3,month4,month5,month6,month7,month7,month8,month9,month20,month21,month22 FROM tmp_result WHERE pname <> '--') AS ir
GROUP BY pid;
END IF;
END IF;
IF qureyType  = 'week' OR qureyType  = 'WEEK' THEN
IF EXISTS(SELECT * FROM information_schema.`TABLES` T WHERE TABLE_NAME = 'tmp_result' AND TABLE_SCHEMA = ku) THEN
DROP TABLE tmp_result;
END IF;
CREATE TABLE tmp_result
(pid VARCHAR(50),pName VARCHAR(50),cid VARCHAR(50),cName VARCHAR(50),ct1id VARCHAR(50),ct1Name VARCHAR(50),ct2id VARCHAR(50),ct2Name VARCHAR(50),week1 INTEGER,week2 INTEGER,week3 INTEGER,week4 INTEGER,heji INTEGER);
lable_exit: BEGIN
SET @SqlCmd = ' INSERT INTO tmp_result (pid,pname,cid,cname,ct1id,ct1name,ct2id,ct2name)
SELECT pid,pname,cid,cname,ct1id,ct1name,ct2id,ct2name FROM
(SELECT ia.pid,a.name AS pname,ia.cid,b.name AS cname,ia.ct1id,c.name AS ct1name,ia.ct2id,d.name AS ct2name
FROM ireport ia
LEFT JOIN province a ON ia.pid=a.id
LEFT JOIN city b ON ia.cid=b.id
LEFT JOIN t_category1 c ON ia.ct1id=c.id
LEFT JOIN t_category2 d ON ia.ct2id=d.id
WHERE YEAR(ia.creatTime)=YEAR(?) And MONTH(ia.creatTime)=MONTH(?) ';
IF p_ids IS NOT NULL AND p_ids <> '' THEN
SET @SqlCmd = CONCAT(@SqlCmd , 'and ia.pid in (');
SET @SqlCmd = CONCAT(@SqlCmd, p_ids);
SET @SqlCmd = CONCAT(@SqlCmd, ')');
END IF;
IF c_ids IS NOT NULL AND c_ids <> '' THEN
SET @SqlCmd = CONCAT(@SqlCmd , 'and ia.cid in (');
SET @SqlCmd = CONCAT(@SqlCmd, c_ids);
SET @SqlCmd = CONCAT(@SqlCmd, ')');
END IF;
IF ct1_ids IS NOT NULL AND ct1_ids <> '' THEN
SET @SqlCmd = CONCAT(@SqlCmd , 'and ia.ct1id in (');
SET @SqlCmd = CONCAT(@SqlCmd, ct1_ids);
SET @SqlCmd = CONCAT(@SqlCmd, ')');
END IF;
IF ct2_ids IS NOT NULL AND ct2_ids <> '' THEN
SET @SqlCmd = CONCAT(@SqlCmd , 'and ia.ct2id in (');
SET @SqlCmd = CONCAT(@SqlCmd, ct2_ids);
SET @SqlCmd = CONCAT(@SqlCmd, ')');
END IF;
SET @SqlCmd = CONCAT(@SqlCmd , ') AS ir GROUP BY pid,pname,cid,cname,ct1id,ct1name,ct2id,ct2name;');
PREPARE stmt1 FROM @SqlCmd;
SET @a = daytime;
EXECUTE stmt1 USING @a,@a;
DEALLOCATE PREPARE stmt1;
LEAVE lable_exit;
END lable_exit;

WHILE i <= 4 DO
  lable_exit: BEGIN
SET @SqlCmd = 'UPDATE tmp_result AS a,
(
SELECT pid,cid,ct1id,ct2id,SUM(crawlerNumber) AS crawlerNumber FROM
(SELECT pid,cid,ct1id,ct2id,crawlerNumber FROM ireport WHERE WEEK=? AND MONTH(creatTime)=MONTH(?)) AS ir
GROUP BY pid,cid,ct1id,ct2id
) AS b
SET a.week';
SET @SqlCmd = CONCAT(@SqlCmd , i);
SET @SqlCmd = CONCAT(@SqlCmd , '=b.crawlerNumber ');
SET @SqlCmd = CONCAT(@SqlCmd , 'WHERE a.pid=b.pid AND a.cid=b.cid AND a.ct1id=b.ct1id AND a.ct2id=b.ct2id; ');
PREPARE stmt1 FROM @SqlCmd;
SET @a = i;
SET @b = daytime;
EXECUTE stmt1 USING @a,@b;
DEALLOCATE PREPARE stmt1;
LEAVE lable_exit;
    END lable_exit;
  lable_exit: BEGIN
  SET @SqlCmd = 'UPDATE tmp_result SET week';
SET @SqlCmd = CONCAT(@SqlCmd , i);
SET @SqlCmd = CONCAT(@SqlCmd , ' = 0 WHERE week');
SET @SqlCmd = CONCAT(@SqlCmd , i);
SET @SqlCmd = CONCAT(@SqlCmd , ' IS NULL');
PREPARE stmt1 FROM @SqlCmd;
EXECUTE stmt1;
DEALLOCATE PREPARE stmt1;
LEAVE lable_exit;
  END lable_exit;
  SET i = i + 1;
END WHILE;
UPDATE tmp_result SET heji=week1+week2+week3+week4;

INSERT INTO tmp_result (pid,pname,cid,cname,ct1id,ct1name,ct2id,ct2name,week1,week2,week3,week4,heji)
SELECT '' AS pid,'--' AS pname,'' AS cid,'總合計:' AS cname,'' AS ct1id,'--' AS ct1name,'' AS ct2id,'--' AS ct2name, SUM(week1) AS week1,SUM(week2) AS week2,SUM(week3) AS week3,SUM(week4) AS week4,SUM(heji) AS heji
FROM tmp_result;
IF ireport_chart  = 'report' OR ireport_chart  = 'REPORT' THEN
SELECT pid,pName,cid,cName,ct1id,ct1Name,ct2id,ct2Name,week1,week2,week3,week4,heji FROM tmp_result;
END IF;
IF ireport_chart  = 'chart' OR ireport_chart  = 'CHART' THEN
SELECT '' as pid,pName,'' as cid,'' as cName,'' as ct1id,'' as ct1Name,'' as ct2id,'' as ct2Name,SUM(week1) AS week1,SUM(week2) AS week2,SUM(week3) AS week3,SUM(week4) AS week4,'' as heji
FROM (SELECT pid,cid,pname,cname,week1,week2,week3,week4 FROM tmp_result WHERE pname <> '--') AS ir
GROUP BY pid;
END IF;
END IF;
END $$

DELIMITER ;

看完上述內容，你們對mysql中怎么實現定時任務有進一步的了解嗎？如果還想了解更多知識或者相關內容，請關注億速云行業資訊頻道，感謝大家的支持。