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SQL中两种表复制语句
Insert是T-sql中常用语句,Insert INTO table(field1,field2,...) values(value1,value2,...)这种形式的在应用程序开发中必不可少。但我们在开发、测试过程中,经常会遇到需要表复制的情况,如将 一个table1的数据的部分字段复制到tab...
分类:数据库   时间:2014-08-01 15:42:31    阅读次数:292
python 的一些小技巧
赋值:a, b, c = 'xixi', 'haha', 'hehe'连接字典:>>> s = {1:'a', 2:'b', 3:'c'}>>> s.keys()[1, 2, 3]>>> s.values()['a', 'b', 'c']>>> s.items()[(1, 'a'), (2, 'b'...
分类:编程语言   时间:2014-08-01 09:12:31    阅读次数:333
Unique Binary Search Trees II leetcode java
题目: Given n, generate all structurally unique BST's (binary search trees) that store values 1...n.For example,Given n = 3, your program should return....
分类:编程语言   时间:2014-08-01 04:53:31    阅读次数:279
Unique Binary Search Trees leetcode java
题目:Given n, how many structurally unique BST's (binary search trees) that store values 1...n?For example,Given n = 3, there are a total of 5 unique B....
分类:编程语言   时间:2014-08-01 04:53:11    阅读次数:272
[leetcode]Path Sum
Path SumGiven a binary tree and a sum, determine if the tree has a root-to-leaf path such that adding up all the values along the path equals the give...
分类:其他好文   时间:2014-07-31 23:18:10    阅读次数:227
SQL Server 锁的排队机制
1、新建一个表,插入1010000数据: create table test(id int identity(1,1) ,name varchar(600)) go insert into test values(replicate('a',600)); go 1010000 create index idx_test_id on test(id) 2、新开一个会话(A),运...
分类:数据库   时间:2014-07-31 17:10:27    阅读次数:359
Exponentiation(高精度)
Description Problems involving the computation of exact values of very large magnitude and precision are common. For example, the computation of the national debt is a taxing experience for many ...
分类:其他好文   时间:2014-07-31 17:08:06    阅读次数:267
Path Sum leetcode java
题目:Given a binary tree and a sum, determine if the tree has a root-to-leaf path such that adding up all the values along the path equals the given su....
分类:编程语言   时间:2014-07-31 05:21:25    阅读次数:214
UVA 11235 Frequent values(RMQ)
Frequent values          TimeLimit:3000Ms You are given a sequence of n integers a1 , a2 , ... , an in non-decreasing order. In addition to that, you are given several queries consisting of indices...
分类:其他好文   时间:2014-07-30 20:51:23    阅读次数:507
array_count_values函数
array_count_values() 函数用于统计数组中所有值出现的次数。本函数返回一个数组,其元素的键名是原数组的值,键值是该值在原数组中出现的次数。例子输出:Array ( [Cat] => 1 [Dog] => 2 [Horse] => 1 )
分类:其他好文   时间:2014-07-30 20:37:04    阅读次数:299
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