mysql导入数据导数据提示Duplicate entryfor key 错误 下面我来分析一下我的解决方法，有需要学习的朋友可参考一下。
之前服务器数据丢失后决定搬家了用PHPMYADMIN导出,因为数据库文件比较大,所以直接使用MYSQL命令直接导入
MySQL导出导入命令
但是结果却不断的出现
ERROR 1062 (23000) at line 1262: Duplicate entry '?�ꡣ�H�o' for key 2
然后就中止了.NND这家伙吃软不吃硬。来硬的。。 --force。强行导入。不退出
# mysql -u root -p fukai --force
Enter password:
ERROR 1062 (23000) at line 1262: Duplicate entry '?�ꡣ�H�o' for key 2
ERROR 1062 (23000) at line 1263: Duplicate entry 'm?oʙ�H�m' for key 2
ERROR 1062 (23000) at line 1271: Duplicate entry '?���^��Ц' for key 2
ERROR 1062 (23000) at line 5182: Duplicate entry '?�ꡣ�H�o' for key 2
ERROR 1062 (23000) at line 5187: Duplicate entry '?���^��Ц' for key 2
ERROR 1231 (42000) at line 7268: Variable 'sql_mode' can't be set to the value of 'NULL'
yingouqlj@qljlearnhost:/home/jump$ mysql uynetwork
ERROR 1062 (23000) at line 20449: Duplicate entry '??????' for key 1费解
上网查阅后有说使用-FORCE 强制导入
mysql uynetwork
最后发现原来在PHPMYADMIN导出的时候文件编码是UTF-8的最后使用
| 代码如下 | 复制代码 |
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mysql uynetwork |
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总结
Duplicate entry...for key...的错误原因是主键的唯一值重复，在对数据库进行修改、插入操作时，一但主键的唯一值重复就会报此错误，有时在表中存在多个主键时，对表操作仍然报此错误，是因为对该表的索引造成的。例如一个表中有 id1,id2两个主键，但是在插入数据时已经存在了ff,11这样一条纪录，再插入ff,22这样一条记录应该是没问题的，但是却报出上面这个错误，导致的原因就是索引时只对id1这个字段进行了索引，没有对id2进行联合索引，所以在插入ff,22这条记录时会报错。
处理方法：在该表的Indexes中的index_1进行处理，加入另外一个主键就可以了。
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