mysql防篡改

mysql防篡改"/>

mysql防篡改

MySQL数据库可以通过触发器，使之无法修改某些字段的数据，同时又不会影响修改其他字段。

DROP TRIGGER IF EXISTS `members`;

SET @OLD_SQL_MODE=@@SQL_MODE, SQL_MODE='';

DELIMITER //

CREATE TRIGGER `members` BEFORE UPDATE ON `members` FOR EACH ROW BEGIN

set new.name = old.name;

set new.cellphone = old.cellphone;

set new.email = old.email;

set new.password = old.password;

END//

DELIMITER ;

SET SQL_MODE=@OLD_SQL_MODE;

再举一个例子：

CREATE TABLE `account` (

`id` INT(10) UNSIGNED NOT NULL AUTO_INCREMENT,

`user` VARCHAR(50) NOT NULL DEFAULT '0',

`cash` FLOAT NOT NULL DEFAULT '0',

PRIMARY KEY (`id`)

)

COLLATE='utf8_general_ci'

ENGINE=InnoDB;

每一次数据变化新增一条数据

INSERT INTO `test`.`account` (`user`, `cash`) VALUES ('neo', -10);

INSERT INTO `test`.`account` (`user`, `cash`) VALUES ('neo', -5);

INSERT INTO `test`.`account` (`user`, `cash`) VALUES ('neo', 30);

INSERT INTO `test`.`account` (`user`, `cash`) VALUES ('neo', -20);

保护用户的余额不被修改

DROP TRIGGER IF EXISTS `account`;

SET @OLD_SQL_MODE=@@SQL_MODE, SQL_MODE='';

DELIMITER //

CREATE TRIGGER `account` BEFORE UPDATE ON `account` FOR EACH ROW BEGIN

set new.cash = old.cash;

END//

DELIMITER ;

SET SQL_MODE=@OLD_SQL_MODE;