Mysql应用MySQL数据库防止人为误操作的实例讲解

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MYSQL必读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数据库误操作的办法做出如下详解：

MYSQL必读1、mysql赞助说明

MYSQL必读
# mysql --help|grep dummy  
 -U,--i-am-a-dummy Synonym for option --safe-updates,-U. 
i-am-a-dummy  FALSE

MYSQL必读在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法式就会拒绝执行

MYSQL必读2、指定-U登录测试

MYSQL必读
# 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

MYSQL必读提示：此处不加条件无法删除,目的达到.

MYSQL必读3、做成别号防止DBA误操作

MYSQL必读
# 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'

MYSQL必读结论：在mysql命令加上选项-U后,mysql法式拒绝执行

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