Network of SchoolsTime Limit:1000MSMemory Limit:10000KTotal Submissions:12240Accepted:4871DescriptionA number of schools are connected to a computer n...
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Web程序 时间:
2015-04-17 17:30:40
阅读次数:
148
ZigZag Conversion
The string "PAYPALISHIRING" is written in a zigzag pattern on a given number
of rows like this: (you may want to display this pattern in a fixed font for better legibility)
P...
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其他好文 时间:
2015-04-17 15:49:24
阅读次数:
144
Palindrome Number
Determine whether an integer is a palindrome. Do this without extra space.
解题思路:
思路比较简单,将原来的数求逆数。若逆数与原数相等,返回true,否则,返回false。弄清楚,负数能否回文?若溢出咋办?这里总结一下,若遇到整数的逆转,或者字符转化为整数,就需要考虑是否溢...
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其他好文 时间:
2015-04-17 15:42:22
阅读次数:
115
CREATE OR REPLACE TRIGGER TR_CGD1 BEFORE UPDATE OR INSERT OR DELETE ON BB_MJ_CGD1_TB FOR EACH ROWDECLARE V_COUNT NUMBER;BEGIN CASE WHEN UPDATIN...
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其他好文 时间:
2015-04-17 15:31:55
阅读次数:
313
示例操作如下--班级信息表create table t_class_info( classno number(3) primary key, classname varchar2(10), classplace varchar2(13) ); --学生信息表create table t_stu...
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其他好文 时间:
2015-04-17 15:30:55
阅读次数:
164
Given an integern, return the number of trailing zeroes inn!.Note:Your solution should be in logarithmic time complexity.思路:编程之美里有,就是找因子5的个数。int trail...
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其他好文 时间:
2015-04-17 15:27:58
阅读次数:
106
题目:Given a linked list, reverse the nodes of a linked listkat a time and return its modified list.If the number of nodes is not a multiple ofkthen lef...
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其他好文 时间:
2015-04-17 15:15:10
阅读次数:
114
带有参数的视图 create function fn_fenye (@count as int,@page as int) returns table as return select * from (select row_number() over (order by id)as num...
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数据库 时间:
2015-04-17 15:12:52
阅读次数:
173
聚类查询所针对的对象是表的其中一列,譬如如下的testtable表,要查出username这一列中,各个项所出现的次数,则用到聚类查询
显然,聚类查询之后,得到的结果必须与id,number这两列半点关系都没有。因此,也就是正如上门,所说,聚类查询所针对的对象是表的其中一列。
聚类查询往往配合count(*),sum(*),avg(*)等聚类语句,用来对表进行统计。由于查询的字段往往是...
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数据库 时间:
2015-04-17 13:59:17
阅读次数:
287
SubsettingThere are a number of operators that can be used to extract subsets of R objects.[ always returns an object of the same class as the origina...
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其他好文 时间:
2015-04-17 13:39:09
阅读次数:
120