/*

對*dt庫下的所有數(shù)據(jù)表刪除docuemttype為空和documenttype為MD,PD,ET的數(shù)據(jù)：

delete from 表名 where length(documenttype)<2 or documenttype is null or documenttype in ('et','md','pd');

*/

DELIMITER $$

USE `數(shù)據(jù)庫名稱1`$$

DROP PROCEDURE IF EXISTS `存儲過程名稱1`$$

CREATE PROCEDURE `存儲過程名稱1`()

BEGIN

DECLARE str varchar(40);

DECLARE Done INT DEFAULT 0;

DECLARE rs CURSOR FOR SELECT table_name FROM INFORMATION_SCHEMA.TABLES WHERE table_schema = '數(shù)據(jù)庫名稱1';

/* 異常處理 */

DECLARE CONTINUE HANDLER FOR SQLSTATE '02000' SET Done = 1;

/* 打開游標 */

OPEN rs;

/* 逐個取出當(dāng)前記錄userId字段的值*/

FETCH NEXT FROM rs INTO str;

/* 遍歷數(shù)據(jù)表 */

REPEAT

delete from str where length(documenttype)<2 or documenttype is null or documenttype in ('et','md','pd');

FETCH NEXT FROM rs INTO str;

UNTIL Done END REPEAT;

/* 關(guān)閉游標 */

CLOSE rs;

END$$

DELIMITER ;

use 數(shù)據(jù)庫名稱1;

call 存儲過程名稱1;

/*

對*sd庫下的所有數(shù)據(jù)表刪除docuemttype不為空的數(shù)據(jù)

delete from 表名 where length(documenttype)>1;

*/

DELIMITER $$

USE `數(shù)據(jù)庫名稱2`$$

DROP PROCEDURE IF EXISTS `存儲過程名稱2`$$

CREATE PROCEDURE `存儲過程名稱2`()

BEGIN

DECLARE str varchar(40);

DECLARE Done INT DEFAULT 0;

DECLARE rs CURSOR FOR SELECT table_name FROM INFORMATION_SCHEMA.TABLES WHERE table_schema = '數(shù)據(jù)庫名稱2';

/* 異常處理 */

DECLARE CONTINUE HANDLER FOR SQLSTATE '02000' SET Done = 1;

/* 打開游標 */

OPEN rs;

/* 逐個取出當(dāng)前記錄userId字段的值*/

FETCH NEXT FROM rs INTO str;

/* 遍歷數(shù)據(jù)表 */

REPEAT

delete from str where length(documenttype)>1;

FETCH NEXT FROM rs INTO str;

UNTIL Done END REPEAT;

/* 關(guān)閉游標 */

CLOSE rs;

END$$

DELIMITER ;

use 數(shù)據(jù)庫名稱2;

call 存儲過程名稱2;

/*

對*et庫下的所有數(shù)據(jù)表刪除非學(xué)位論文數(shù)據(jù)：

delete from 表名 where length(doucmenttype)='' or documenttype is null or documenttype not in ('et','md','pd');

*/

DELIMITER $$

USE `數(shù)據(jù)庫名稱3`$$

DROP PROCEDURE IF EXISTS `存儲過程名稱3`$$

CREATE PROCEDURE `存儲過程名稱3`()

BEGIN

DECLARE str varchar(40);

DECLARE Done INT DEFAULT 0;

DECLARE rs CURSOR FOR SELECT table_name FROM INFORMATION_SCHEMA.TABLES WHERE table_schema = '數(shù)據(jù)庫名稱3';

/* 異常處理 */

DECLARE CONTINUE HANDLER FOR SQLSTATE '02000' SET Done = 1;

/* 打開游標 */

OPEN rs;

/* 逐個取出當(dāng)前記錄userId字段的值*/

FETCH NEXT FROM rs INTO str;

/* 遍歷數(shù)據(jù)表 */

REPEAT

delete from str where length(doucmenttype)='' or documenttype is null or documenttype not in ('et','md','pd');

FETCH NEXT FROM rs INTO str;

UNTIL Done END REPEAT;

/* 關(guān)閉游標 */

CLOSE rs;

END$$

DELIMITER ;

use 數(shù)據(jù)庫名稱3;

call 存儲過程名稱3;

本條技術(shù)文章來源于互聯(lián)網(wǎng)，如果無意侵犯您的權(quán)益請點擊此處反饋版權(quán)投訴

本文系統(tǒng)來源：php中文網(wǎng)

TAG標簽：數(shù)據(jù)庫數(shù)據(jù)表

總結(jié)

以上是生活随笔為你收集整理的mysql游标遍历数据库_MySQL数据库中，使用游标循环遍历_MySQL的全部內(nèi)容，希望文章能夠幫你解決所遇到的問題。

如果覺得生活随笔網(wǎng)站內(nèi)容還不錯，歡迎將生活随笔推薦給好友。