use mydb --排序select *from Category order by Ids asc--order排序的意思--asc 升序select *from Category order by Ids desc--desc 降序select *from Category order by ...
分类:
数据库 时间:
2014-11-25 10:25:27
阅读次数:
268
【题目】
Given a singly linked list where elements are sorted in ascending order, convert it to a height balanced BST.
【解析】
分治:用快慢指针找到链表的中点,作为树的root,然后二分——中点之前的链表和中点之后的链表分别再构造二叉平衡树。
/**
* Defin...
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其他好文 时间:
2014-11-24 22:39:00
阅读次数:
218
leetcode-Binary Tree Level Order Traversal 二叉树层序遍历
#include
#include
using namespace std;
typedef struct BiTree
{
int val;
struct BiTree *lchild;
struct BiTree *rchild;
}BiTree;
void main(...
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其他好文 时间:
2014-11-24 22:35:13
阅读次数:
202
Given a binary tree, return the level order traversal of its nodes' values. (ie, from left to right, level by level).
For example:
Given binary tree {3,9,20,#,#,15,7},
3
/ 9 20
...
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其他好文 时间:
2014-11-24 22:33:13
阅读次数:
272
Given a binary tree, return the zigzag level order traversal of its nodes' values. (ie, from left to right, then right to left for the next level and alternate between).
For example:
Given binary ...
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其他好文 时间:
2014-11-24 22:31:45
阅读次数:
196
The Sequence objectSome examples will also require a working internet connection in order to run.>>> from Bio.Seq import Seq>>> from Bio.Alphabet impo...
分类:
编程语言 时间:
2014-11-24 22:07:43
阅读次数:
297
1. To change the order of PATH items, you just need to put the newly-added path in front of the PATH, or at the back of the path to put it behind all ...
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其他好文 时间:
2014-11-24 20:38:15
阅读次数:
201
T-SQL中使用SELECT语句进行数据查询,SELECT语法结构: ::= [WITH [,...n]] [ ORDER BY { order_by_expression | column_position [ ASC | DESC ] } [ ,...n ] ...
分类:
数据库 时间:
2014-11-24 13:13:50
阅读次数:
235
1.查询重复的信息:
select *
from Rex_Test
where tName in (select tName from Rex_Test group by tName having count(1) >= 2)
2.从表中随机读取N条数据
Select top N * From table Order by newid()
3.多条件查询时,当条件有为空的情况
...
分类:
数据库 时间:
2014-11-24 10:04:59
阅读次数:
185
在做项目的时候,需要查询数据库中相应字段的内容长度,以下是记录下来的方法:SELECT length = DATALENGTH(username), username FROM TABLENAME ORDER BY length desc
分类:
数据库 时间:
2014-11-24 09:50:04
阅读次数:
206