MySQL数据库防止人为误操作的实例讲解
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2024-02-28 17:14:28
有不少开发人员在操作mysql数据库的时候都遇到过误操作的情况,例如更新数据库的时候update语句忘记加上where条件,就会造成极为悲剧的结果。本文就针对防止mysql...
有不少开发人员在操作mysql数据库的时候都遇到过误操作的情况,例如更新数据库的时候update语句忘记加上where条件,就会造成极为悲剧的结果。本文就针对防止mysql数据库误操作的方法做出如下详解:
1、mysql帮助说明
# mysql --help|grep dummy -u, --i-am-a-dummy synonym for option --safe-updates, -u. i-am-a-dummy false
在mysql命令加上选项-u后,当发出没有where或limit关键字的update或delete时,mysql程序就会拒绝执行
2、指定-u登录测试
# mysql -uroot -poldboy123 -s /data/3306/mysql.sock -u welcome to the mysql monitor. commands end with ; or \g. your mysql connection id is 14 server version: 5.5.32-log mysql community server (gpl) copyright (c) 2000, 2013, oracle and/or its affiliates. all rights reserved. oracle is a registered trademark of oracle corporation and/or its affiliates. other names may be trademarks of their respective owners. type 'help;' or '\h' for help. type '\c' to clear the current input statement. mysql> delete from oldboy.student; error 1175 (hy000): you are using safe update mode and you tried to update a table without a where that uses a key column mysql> quit bye
提示:此处不加条件无法删除,目的达到。
3、做成别名防止dba误操作
# alias mysql='mysql -u' # mysql -uroot -poldboy123 -s /data/3306/mysql.sock welcome to the mysql monitor. commands end with ; or \g. your mysql connection id is 15 server version: 5.5.32-log mysql community server (gpl) type 'help;' or '\h' for help. type '\c' to clear the current input statement. mysql> delete from oldboy.student; error 1175 (hy000): you are using safe update mode and you tried to update a table without a where that uses a key column mysql> delete from oldboy.student where sno=5; query ok, 1 row affected (0.02 sec) mysql> quit bye # echo "alias mysql='mysql -u'" >>/etc/profile # . /etc/profile # tail -1 /etc/profile alias mysql='mysql -u'
结论:在mysql命令加上选项-u后,当发出没有where或limit关键字的update或delete时,mysql程序拒绝执行