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oracle 查看锁表情况并处理锁表
/* *locked *query locked object and analyse reason,kill it * */ select 'alter system kill session ''' || SID || ',' || SERIAL# || ''';' from (select distinct a.sid, ...
分类:数据库   时间:2014-09-16 16:01:50    阅读次数:238
mongodb distinct去重
MongoDB的destinct命令是获取特定字段中不同值列表。该命令适用于普通字段,数组字段和数组内嵌文档.mongodb的distinct的语句:db.users.distinct('last_name')等同于 SQL 语句:select DISTINCT last_name from u.....
分类:数据库   时间:2014-09-15 15:31:39    阅读次数:331
HDU - 5012 Dice(BFS)
Problem Description There are 2 special dices on the table. On each face of the dice, a distinct number was written. Consider a1.a2,a3,a4,a5,a6 to be numbers written on top face, bottom face, left ...
分类:其他好文   时间:2014-09-15 01:08:48    阅读次数:204
plsql exist和in 的区别
发现公司同事很喜欢用exists和in做子查询关联,我觉得很有必要研究下两者的区别,供参考和备忘/*(这段信息来自网络begin)对于in的使用,就相当于对inner table执行一个带distinct的子查询,然后将得到的结果集再和outer table进行外连接,连接方式和索引使用任然同于普通...
分类:数据库   时间:2014-09-14 21:56:07    阅读次数:316
HDU5012:Dice(bfs模板)
http://acm.hdu.edu.cn/showproblem.php?pid=5012Problem Description There are 2 special dices on the table. On each face of the dice, a distinct number ...
分类:其他好文   时间:2014-09-14 20:35:37    阅读次数:269
the (plasma) cutters have specialized functionalities that is distinct than other CNC machineries
eastwood's versa cut plasma cutter The machine is able to create clean, mini laser engraver for sale and sharp cuts as its torch head are computer con...
分类:其他好文   时间:2014-09-12 10:08:03    阅读次数:278
POJ 1094-Sorting It All Out(拓扑排序)
Sorting It All Out Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 28055   Accepted: 9689 Description An ascending sorted sequence of distinct values is one ...
分类:其他好文   时间:2014-09-11 21:00:22    阅读次数:168
Distinct Subsequences----匹配个串串
给定母串S和待匹配串T,求T能在母串S中匹配多少次(不一定要连续匹配,并且母串中多个相同字母可以依次使用,但均只能使用一次,如S=rabbbit T=rabbit, 则S中三个连续的b可以依次匹配T中两个bb各一次())...
分类:其他好文   时间:2014-09-11 19:31:32    阅读次数:139
Leetcode: N-Queens II
Follow up for N-Queens problem.Now, instead outputting board configurations, return the total number of distinct solutions.跟N-Queen的考虑方式完全一样,NP问题,用循环递...
分类:其他好文   时间:2014-09-11 13:46:11    阅读次数:176
Leetcode dfs N-Queens II
N-Queens II  Total Accepted: 12668 Total Submissions: 38109My Submissions Follow up for N-Queens problem. Now, instead outputting board configurations, return the total number of distinct...
分类:其他好文   时间:2014-09-10 09:38:20    阅读次数:218
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