DQL 查询语句-- select [列名,列名,列名...](投影) from 表名 -- [where 条件(0个或多个)]-- [group by 列名](分组)-- [having 条件](分组过滤) -- [order by 列名](排序)-- [limit 序号,长度](截取) -- 最 ...
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数据库 时间:
2019-12-22 16:44:03
阅读次数:
69
题目描述 求出1~13的整数中1出现的次数,并算出100~1300的整数中1出现的次数?为此他特别数了一下1~13中包含1的数字有1、10、11、12、13因此共出现6次,但是对于后面问题他就没辙了。ACMer希望你们帮帮他,并把问题更加普遍化,可以很快的求出任意非负整数区间中1出现的次数(从1 到 ...
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其他好文 时间:
2019-12-21 22:37:56
阅读次数:
93
Description Given an array nums containing n + 1 integers where each integer is between 1 and n (inclusive), guarantee that at least one duplicate num ...
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其他好文 时间:
2019-12-21 20:53:19
阅读次数:
114
Description Given a list of Connections, which is the Connection class (the city name at both ends of the edge and a cost between them), find edges th ...
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其他好文 时间:
2019-12-21 12:00:30
阅读次数:
76
With Java programming language, the three terms i.e. JDK, JRE and JVM will always be there to understand the difference between them. If you area Java ...
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其他好文 时间:
2019-12-20 20:37:09
阅读次数:
101
Given an array nums containing n + 1 integers where each integer is between 1 and n (inclusive), prove that at least one duplicate number must exist. ...
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其他好文 时间:
2019-12-19 12:50:24
阅读次数:
95
Given an integer number n, return the difference between the product of its digits and the sum of its digits. Example 1: Input: n = 234 Output: 15 Exp ...
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其他好文 时间:
2019-12-19 09:20:24
阅读次数:
92
B - Networking POJ - 1287 You are assigned to design network connections between certain points in a wide area. You are given a set of points in the a ...
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其他好文 时间:
2019-12-18 23:24:52
阅读次数:
107
继续上一篇hadoop的安装。一、安装zookooper1、解压zookoopertar-zxfvzookeeper-3.3.6.tar.gz2、修改配置:cpzookeeper/conf/zoo_sample.cfgzoo.cfgThenumberofmillisecondsofeachticktickTime=2000Thenumberofticksthattheinitialsynchron
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其他好文 时间:
2019-12-18 11:07:30
阅读次数:
180