方法1:1、创建一个临时表,选取需要的数据。2、清空原表。3、临时表数据导入到原表。4、删除临时表。mysql> select * from student;+ + +| ID | NAME |+ + +| 11 | aa || 12 | aa || 13 | bb || 14 | bb || 15 ...
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数据库 时间:
2017-07-17 11:17:37
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183
转:http://www.jb51.net/article/39255.htmmysql "ON DUPLICATE KEY UPDATE" 语法如果在INSERT语句末尾指定了ON DUPLICATE KEY UPDATE,并且插入行后会导致在一个UNIQUE索引或PRIMARY KEY中出现重复 ...
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数据库 时间:
2017-07-14 14:45:34
阅读次数:
195
Given a string which contains only lowercase letters, remove duplicate letters so that every letter appear once and only once. You must make sure your ...
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其他好文 时间:
2017-07-14 13:15:31
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195
参考: https://github.com/maccman/dhash http://blog.iconfinder.com/detecting-duplicate-images-using-python/ 讲的很详细 http://www.hackerfactor.com/blog/index. ...
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编程语言 时间:
2017-07-13 20:25:42
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302
FYI: http://docs.oracle.com/cd/E11882_01/backup.112/e10643/rcmsynta020.htm#RCMRF126 rman duplicate database 必须是同样的平台,可是支持32bit\64bit 间复制,在复制完毕后须要执行¥OR ...
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其他好文 时间:
2017-07-11 21:04:19
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211
Given a sorted linked list, delete all nodes that have duplicate numbers, leaving only distinct numbers from the original list. For example,Given 1->2 ...
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其他好文 时间:
2017-07-11 17:53:47
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138
Given a sorted array and a target value, return the index if the target is found. If not, return the index where it would be if it were inserted in or ...
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其他好文 时间:
2017-07-11 15:52:08
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117
命令:nginx -t 查看失败原因: nginx: [emerg] "fastcgi_pass" directive is duplicate in /etc/nginx/sites-enabled/default:61 nginx: configuration file /etc/nginx/n ...
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系统相关 时间:
2017-07-09 20:42:46
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189
196. Delete Duplicate Emails Write a SQL query to delete all duplicate email entries in a table named Person, keeping only unique emails based on its ...
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数据库 时间:
2017-07-08 18:54:36
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208
181. Employees Earning More Than Their Managers The Employee table holds all employees including their managers. Every employee has an Id, and there i ...
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数据库 时间:
2017-07-08 18:41:21
阅读次数:
213