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Oracle hint之ORDERED和USE_NL
Hint:ORDERED和USE_NL ORDERED好理解,就是表示根据 from 后面表的顺序join,从左到右,左边的表做驱动表 use_nl(t1,t2):表示对表t1、t2关联时采用嵌套循环连接,其并不能让优化器确定谁是驱动表或谁是被驱动的表 USE_NL(),先看看oracle doc怎 ...
分类:数据库   时间:2017-10-10 13:19:58    阅读次数:185
最长回文子串
Given a string s, find the longest palindromic substring in s. You may assume that the maximum length of s is 1000. Example: Input: "babad" Output: "b ...
分类:其他好文   时间:2017-10-09 23:57:19    阅读次数:231
Hibernate--抓取策略
抓取策略: 为了改变SQL语句执行的方式 Hibernate的抓取策略只影响get/load方法,对HQL是不影响的 查询一方有三种策略: 默认使用fetch="select"策略 会执行多条SQL语句 可以使用fetch="join"策略 会执行左外连接的SQL语句 可以使用fetch="subs ...
分类:Web程序   时间:2017-10-09 13:09:12    阅读次数:192
LeetCode 402: Remove K Digits
Note: 1. Find a increasing digits number. It's kind of longest increasing subsequence but with fixed size. 2. Remember to remove the zeros from beginn ...
分类:其他好文   时间:2017-10-08 16:50:40    阅读次数:168
[LeetCode] Longest Univalue Path 最长相同值路径
Given a binary tree, find the length of the longest path where each node in the path has the same value. This path may or may not pass through the roo ...
分类:其他好文   时间:2017-10-08 00:55:06    阅读次数:125
[leetcode-687-Longest Univalue Path]
Given a binary tree, find the length of the longest path where each node in the path has the same value. This path may or may not pass through the roo ...
分类:其他好文   时间:2017-10-07 23:30:53    阅读次数:221
5. Longest Palindromic Substring
5. Longest Palindromic Substring Given a string s, find the longest palindromic substring in s. You may assume that the maximum length of s is 1000. E ...
分类:其他好文   时间:2017-10-07 18:37:52    阅读次数:127
LeetCode 562. Longest Line of Consecutive One in Matrix(在矩阵中最长的连续1)$
Given a 01 matrix M, find the longest line of consecutive one in the matrix. The line could be horizontal, vertical, diagonal or anti-diagonal. Exampl ...
分类:其他好文   时间:2017-10-07 12:19:16    阅读次数:291
3. Longest Substring Without Repeating Characters
Given a string, find the length of the longest substring without repeating characters. Examples: Given "abcabcbb", the answer is "abc", which the leng ...
分类:其他好文   时间:2017-10-06 10:36:15    阅读次数:140
HTML5 Lesson2
列表 <ul> 无序列表</ul> unordered list <li>list item</li> 无序列表默认用实心圆圈做引导标记 <ol start=-1> 有序列表</ol> ordered list start属性为第一条序号 <dl> 定义的列表</dl> <dt>词条</dt> <d ...
分类:Web程序   时间:2017-10-05 22:38:44    阅读次数:265
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