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...
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数据库 时间:
2014-08-01 15:42:31
阅读次数:
292
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'...
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编程语言 时间:
2014-08-01 09:12:31
阅读次数:
333
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....
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编程语言 时间:
2014-08-01 04:53:31
阅读次数:
279
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....
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编程语言 时间:
2014-08-01 04:53:11
阅读次数:
272
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...
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其他好文 时间:
2014-07-31 23:18:10
阅读次数:
227
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...
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数据库 时间:
2014-07-31 17:10:27
阅读次数:
359
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 ...
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其他好文 时间:
2014-07-31 17:08:06
阅读次数:
267
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....
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编程语言 时间:
2014-07-31 05:21:25
阅读次数:
214
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...
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其他好文 时间:
2014-07-30 20:51:23
阅读次数:
507
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 )
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其他好文 时间:
2014-07-30 20:37:04
阅读次数:
299