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Oracle中的DETERMINISTIC
多次看到DETERMINISTIC,一直很疑惑,今天做了一个实验。我们欺骗ORACLE说是一个DETERMINISTIC函数,它在SQL中只调用一次。如果不使用DETERMINISTIC,可以看到出来的值都不一样。使用DETERMINISTIC后,不同的会话都出来一样的值。 SQL> create or replace function f_t(i_p int) return number DE...
分类:数据库   时间:2014-08-05 19:26:30    阅读次数:247
oracle查询连续n天登录的用户
-- 查询连续3天登录的用户1 先创建一个表,如下:1 create table USER_DATA2 (3 USER_ID NUMBER,4 LOGIN_TIME DATE5 );2 插入用户登录数据: 1 insert into user_data (USER_ID, LOGIN_TIME) v...
分类:数据库   时间:2014-08-05 18:13:10    阅读次数:420
程序猿的自我修养清单
Data Structures    1. Integer       – find number of 1s       – next largest smaller       – smallest larger number       – determine if is palindrom       – itoa, atoi       – add 2 numbers w/...
分类:其他好文   时间:2014-08-05 15:50:40    阅读次数:408
Prime Palindrome Golf
Prime Palindrome GolfDo you know how to play Prime Palindrome Golf? You are given a number and your challenge is to find the closest palindromic prime...
分类:其他好文   时间:2014-08-05 13:24:49    阅读次数:274
POJ 3468 A Simple Problem with Integers(线段树 区间更新)
Description You have N integers, A1, A2, ... , AN. You need to deal with two kinds of operations. One type of operation is to add some given number to each number in a given interval. The other ...
分类:其他好文   时间:2014-08-05 11:15:59    阅读次数:243
Python 不同对象比较大小
?: >>> 1 >> int >> dict < int >> int < map False 后来几经周折,和 Fireboo 讨论了下,是 1.不同对象(除了 number 之外),是按照 type names 比较, 2.当相同类型对象不支持适当比较的时候,采用 address 比较 3.l...
分类:编程语言   时间:2014-08-05 11:12:29    阅读次数:273
POJ 1651 Multiplication Puzzle (区间DP)
Description The multiplication puzzle is played with a row of cards, each containing a single positive integer. During the move player takes one card out of the row and scores the number of points eq...
分类:其他好文   时间:2014-08-05 11:12:25    阅读次数:267
3Sum Closest
Given an arraySofnintegers, find three integers inSsuch that the sum is closest to a given number, target. Return the sum of the three integers. You m...
分类:其他好文   时间:2014-08-05 11:07:09    阅读次数:187
HDU 1018 Big Number (简单数学)
Big NumberTime Limit: 2000/1000 MS (Java/Others)Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 25649Accepted Submission(s): 11635Proble...
分类:其他好文   时间:2014-08-05 10:55:29    阅读次数:276
js 不要使用new
(1)不要使用new Array(),new Number, new String, or new Boolean. 等等如果要新建数组,没有必要使用new Array(),使用[];原因是直观。(2)不要使用new Function 来创建函数如果要写代码:myObj = new function...
分类:Web程序   时间:2014-08-05 10:41:49    阅读次数:477
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