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Oracle MERGE INTO的使用方法
非常多时候我们会出现例如以下情境,假设一条数据在表中已经存在,对其做update,假设不存在,将新的数据插入.假设不使用Oracle提供的merge语法的话,可能先要上数据库select查询一下看是否存在,然后决定怎么操作,这种话须要写很多其它的代码,同一时候性能也不好,要来回数据库两次....
分类:数据库   时间:2014-07-23 12:37:46    阅读次数:293
【leetcode刷题笔记】Remove Duplicates from Sorted List II
Given a sorted linked list, delete all nodes that have duplicate numbers, leaving onlydistinctnumbers from the original list.For example,Given1->2->3-...
分类:其他好文   时间:2014-07-23 12:20:16    阅读次数:205
Remove Duplicates from Sorted List II leetcode java
题目:Given a sorted linked list, delete all nodes that have duplicate numbers, leaving only distinct numbers from the original list.For example,Given 1....
分类:编程语言   时间:2014-07-23 12:01:46    阅读次数:312
Merge Two Sorted Lists leetcode java
题目: Merge two sorted linked lists and return it as a new list. The new list should be made by splicing together the nodes of the first two lists. 题解:....
分类:编程语言   时间:2014-07-23 12:01:36    阅读次数:257
Remove Duplicates from Sorted List leetcode java
题目:Given a sorted linked list, delete all duplicates such that each element appear only once.For example,Given 1->1->2, return 1->2.Given 1->1->2->3-....
分类:编程语言   时间:2014-07-23 12:01:16    阅读次数:239
poj 1611 The Suspects
并查集 简单题 1 #include 2 #include 3 int par[1000]; 4 int Find(int x) 5 { 6 while(par[x] >= 0) 7 x = par[x]; 8 return x; 9 }10 void Merge(i...
分类:其他好文   时间:2014-07-23 11:59:06    阅读次数:227
hdu 1232
并查集 入门题 1 #include 2 #include 3 int par[1000]; 4 int Find(int x) 5 { 6 while(par[x] > 0) 7 x = par[x]; 8 return x; 9 }10 void Merge(in...
分类:其他好文   时间:2014-07-23 11:58:18    阅读次数:169
Median of Two Sorted Array leetcode java
题目:There are two sorted arrays A and B of size m and n respectively. Find the median of the two sorted arrays. The overall run time complexity should ...
分类:编程语言   时间:2014-07-23 11:49:36    阅读次数:357
atitit.hbnt orm db 新新增更新最佳实践o7
atitit.hbnt orm db 新新增更新最佳实践o7   1. merge跟个save了. 1 2. POJO对象处于游离态、持久态、托管态。使用merge()的情况。 1 3. @DynamicInsert @DynamicUpdate 2 4. 实际调用merge()生成的sql 2 5. 参考 2     1. merge跟个save了. Update Upda...
分类:数据库   时间:2014-07-22 23:43:47    阅读次数:502
poj 1094
Sorting It All Out Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 26911   Accepted: 9285 Description An ascending sorted sequence of distinct values is one ...
分类:其他好文   时间:2014-07-22 22:38:36    阅读次数:166
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