《Mysql應用MySQL數據庫防止人為誤操作的實例講解》要點：
本文介紹了Mysql應用MySQL數據庫防止人為誤操作的實例講解，希望對您有用。如果有疑問，可以聯系我們。
MYSQL必讀有不少開發人員在操作MySQL數據庫的時候都遇到過誤操作的情況,例如更新數據庫的時候update語句忘記加上where條件,就會造成極為悲劇的結果.本文就針對防止MySQL數據庫誤操作的辦法做出如下詳解：
MYSQL必讀1、mysql贊助說明
MYSQL必讀
# mysql --help|grep dummy
-U, --i-am-a-dummy Synonym for option --safe-updates, -U.
i-am-a-dummy FALSE
MYSQL必讀在mysql命令加上選項-U后,當發出沒有WHERE或LIMIT關鍵字的UPDATE或DELETE時,mysql法式就會拒絕執行
MYSQL必讀2、指定-U登錄測試
MYSQL必讀
# 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必讀提示：此處不加條件無法刪除,目的達到.
MYSQL必讀3、做成別號防止DBA誤操作
MYSQL必讀
# 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必讀結論：在mysql命令加上選項-U后,當發出沒有WHERE或LIMIT關鍵字的UPDATE或DELETE時,mysql法式拒絕執行
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