delete from test where id in (select id from (select max(id) as id,count(text) as count from test group by text having count >1 order by count desc) a...
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数据库 时间:
2015-08-19 19:27:56
阅读次数:
167
如下图查询页面,跟据不同条件动态生成lambda的Where条件和OrderBy,如果要增加或调整查询,只用改前台HTML即可,不用改后台代码前台代码: 1 2 3 员工姓名: 4 部门: 5 6 生日从 7 至 ...
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编程语言 时间:
2015-08-19 16:09:49
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187
SQL命令为: SELECT TABLE_NAME,DATA_LENGTH+INDEX_LENGTH,TABLE_ROWS,concat(round((DATA_LENGTH+INDEX_LENGTH)/1024/1024,2), ‘MB‘) as data FROM TABLES WHERE TABLE_SCHEMA=‘dbmysql‘; 或 select TABLE_NAME,...
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数据库 时间:
2015-08-19 15:04:59
阅读次数:
145
http://stackoverflow.com/questions/23077521/where-and-why-add-repositories-on-build-gradlehttps://jitpack.io/1. Add repository in top level gradle fil...
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移动开发 时间:
2015-08-19 13:09:39
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145
Yii2常用的查询:搜索查询中:$query = Brand::find()->where('brand.status!=1');$users=User::model()->findAll(array('condition'=>'status=1','index'=>'id'));// 这是一个PD...
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其他好文 时间:
2015-08-19 12:53:26
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125
表名: person字段: id, name, age1 张三 202 李四 223 王五 23查询: select id,name,age from person;删除: delete from person where id=1 (删除ID=1的那条数据,)delete from person ...
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数据库 时间:
2015-08-19 11:02:38
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223
Genealogical tree
Special Judge
Problem Description
The system of Martians' blood relations is confusing enough. Actually, Martians bud when they want and where they want. They gather t...
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编程语言 时间:
2015-08-18 22:56:35
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132
一、简介
1、什么是正则表达式
正则表达式本身就是一种语言,这在其它语言是通用的。正则表达式(regular expression)描述了一种字符串匹配的模式,可以用来检查一个串是否含有某种子串、将匹配的子串做替换或者从某个串中取出符合某个条件的子串等。 str.indexOf(‘abc’); //精确匹配 只能匹配字符串“abc”
正则表达式 //模糊匹配Where na...
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编程语言 时间:
2015-08-18 22:52:50
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225
Description
Sometimes some mathematical results are hard to believe. One of the common problems is the birthday paradox. Suppose you are in a party where there are
23 people including you. What is...
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其他好文 时间:
2015-08-18 22:50:12
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194
mysql删除重复记录的原理是: 将需要比较的列放到group by后,取出主键的最小值,再删除不在这个临时表主键的行 命令行格式如下 delete?from?users??where?id?not?in?(?select?id?from?(?select?m...
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数据库 时间:
2015-08-18 19:53:18
阅读次数:
156