MySQL修改字段类型

http://zhidao.baidu.com/question/72734176.html&__bd_tkn__=7bb21c233c3d9b1d4a0f8d7ab49427a08a1f80f58078338d51fed8133ea5c69d362ad36bb4bcda3b39bb3949f6bbe47087ac3af56e60b1f4e7eb60157f5efa319966aefe40491fc7006f300fd146bb783e039d767d2fcf8bd13e350b01203b29b8647e334cb4aeab9c0feabbc9db8003cd3c24f74e

 

http://www.cnblogs.com/fangjins/archive/2012/08/30/2663504.html