oracle sequencesequence 创建的时候,需要注意cache和order场景:1. 当不强行要求序列严格按照顺序来,并最大值大的时候,可以使用cache+noorder ,这样的效率最高2. 当强行要求序列严格安装顺序来,使用cache+order,可以保证顺序
分类:
其他好文 时间:
2014-10-24 08:03:10
阅读次数:
179
You are given two linked lists representing two non-negative numbers. The digits are stored in reverse order and each of their nodes contain a single ...
分类:
其他好文 时间:
2014-10-23 22:15:45
阅读次数:
130
SELECT 主键或能代表当前行的列 FROM (
SELECT 主键或能代表当前行的列 ,重复的列 ,row_number() OVER(PARTITION BY 重复的列 ORDER BY 重复的列 DESC) RN
FROM tableName
) WHERE RN=1
如此读出的都是唯一的,通过RN=1将重复的去掉了。 如...
分类:
数据库 时间:
2014-10-23 20:47:02
阅读次数:
219
1. Activities An Activity is an application component that provides a screen with which users can interact in order to do something, such as dial the....
分类:
移动开发 时间:
2014-10-23 20:29:38
阅读次数:
316
执行插入操作时遇到异常:--- Cause: java.sql.SQLException : 无效的列类型 insert into INFO_AWARD_COUPON_RECORD_CHECK ( ID, ORDER_ID, ...
分类:
其他好文 时间:
2014-10-23 19:16:05
阅读次数:
213
Spiral MatrixGiven a matrix of m x n elements (m rows, n columns), return all elements of the matrix in spiral order.For example,Given the following m...
分类:
其他好文 时间:
2014-10-23 19:03:17
阅读次数:
272
CornfieldsTime Limit:1000MSMemory Limit:30000KTotal Submissions:5516Accepted:2714DescriptionFJ has decided to grow his own corn hybrid in order to hel...
分类:
其他好文 时间:
2014-10-23 15:51:54
阅读次数:
303
1 --==============================视图=============================== 2 --简单视图 3 --注意:视图中不能有ORDER BY,除非指定了TOP! 4 CREATE VIEW v_产品视图 5 AS --AS不能少 6 S...
分类:
数据库 时间:
2014-10-23 14:06:25
阅读次数:
172
Given a matrix of m x n elements (m rows, n columns), return all elements of the matrix in spiral order.
For example,
Given the following matrix:
[
[ 1, 2, 3 ],
[ 4, 5, 6 ],
[ 7, 8, 9 ]
]
You...
分类:
其他好文 时间:
2014-10-23 12:36:01
阅读次数:
176
Given an integer n, generate a square matrix filled with elements from 1 to n2 in
spiral order.
For example,
Given n = 3,
You should return the following matrix:
[
[ 1, 2, 3 ],
[ 8, 9, 4 ],
[...
分类:
其他好文 时间:
2014-10-23 12:31:39
阅读次数:
132