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Search Insert Position
Search Insert Position问题: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 ...
分类:其他好文   时间:2015-03-04 16:15:16    阅读次数:107
[LintCode]k Sum
Given n distinct positive integers, integer k (k <= n) and a number target.Find k numbers where sum is target. Calculate how many solutions there are?...
分类:其他好文   时间:2015-03-04 12:59:04    阅读次数:188
[LintCode]k Sum II
Given n unique integers, number k (1<=k<=n) and target. Find all possible k integers where their sum is target.Example Given [1,2,3,4], k=2, target=5, [1,4] and [2,3] are possible solutions....
分类:其他好文   时间:2015-03-04 12:58:47    阅读次数:126
Oracle CPU使用情况查询
--发现那些SQL运行了大量的PARSE select sql_text, parse_calls, executions from v$sqlarea order by parse_calls desc; --SYS的总的PARSE情况 select name, value from v$sysstat where name like 'parse count%'; --CPU空间及繁...
分类:数据库   时间:2015-03-04 12:56:29    阅读次数:215
LeetCode Combination Sum II
Given a collection of candidate numbers (C) and a target number (T), find all unique combinations in C where the candidate numbers sums to T. Each number in C may only be used once in the combina...
分类:其他好文   时间:2015-03-04 11:05:06    阅读次数:151
DB2数据库的外连接(OUTER JOIN),内连接(INNER JOIN)和交叉连接(CROSS JOIN)区别
1、交叉连接(CROSS JOIN):有两种,显式的和隐式的,不带ON子句,返回的是两表的乘积,也叫笛卡尔积,返回记录的个数应当是a和b表中符合记录的和。显式:select [cols_list] from a cross join b where [condition]隐式:select [col...
分类:数据库   时间:2015-03-04 11:04:59    阅读次数:181
uva 507 Jill Rides Again (DP)
uva 507 Jill Rides Again Jill likes to ride her bicycle, but since the pretty city of Greenhills where she lives has grown, Jill often uses the excellent public bus system for part of her jo...
分类:其他好文   时间:2015-03-04 09:56:14    阅读次数:148
sqlite
1,创建删除触发器create trigger order_Deleteafter delete on orderTablefor each rowbegin update orderTable set id=id-1 where id>old.id;end ;
分类:数据库   时间:2015-03-03 23:33:14    阅读次数:179
LeetCode Combination Sum
Given a set of candidate numbers (C) and a target number (T), find all unique combinations in C where the candidate numbers sums to T. The same repeated number may be chosen from C unlimited numb...
分类:其他好文   时间:2015-03-03 22:13:49    阅读次数:232
Oracle中查询一个表中字段(列)个数
如果一个表中有很多的字段,而我们想要知道这个表中的字段个数,如果使用如下方式一个一个数,则显得很麻烦Oracle中可以使用如下sql来查询字段(列)个数select count(*) from user_tab_columns where table_name=upper('表名')或者select max(column_id) from user_tab_columns where table_...
分类:数据库   时间:2015-03-03 22:08:58    阅读次数:211
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