分页查询格式1
在查询的最外层控制分页的最小值和最大值。查询语句如下:
SELECT * FROM
(
SELECT A.*, ROWNUM RN
FROM (SELECT * FROM TABLE_NAME) A
)
WHERE RN BETWEEN 21 AND 40
分页查询格式2
SELECT * FROM
(
SELECT A.*, ROWNUM RN
FROM (SELECT * FROM TABLE_NAME) A
WHERE ROWNUM =...
分类:
数据库 时间:
2015-01-15 14:18:32
阅读次数:
324
有人在邮件列表问haproxy的作者为何haproxy无论是tcp模式还是http模式,能支撑的并发量都不是太大。Willy回答了这个问题。Exactly. The difference is between LBs that process a stream and whichare proxy-...
分类:
其他好文 时间:
2015-01-15 08:09:26
阅读次数:
151
/**@defCCRANDOM_MINUS1_1
returnsarandomfloatbetween-1and1
返回一个随机漂浮在-1和1之间的随机数*/
#defineCCRANDOM_MINUS1_1()((2.0f*((float)rand()/RAND_MAX))-1.0f)
/**@defCCRANDOM_0_1
returnsarandomfloatbetween0and1
返回一个随机漂浮在0和1之间的随机数
*/
#defi..
分类:
编程语言 时间:
2015-01-14 18:26:33
阅读次数:
785
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 ...
分类:
其他好文 时间:
2015-01-14 12:52:20
阅读次数:
176
整理了一些軟板(FPCB/Flex Cable)製造廠關於線路設計的要求 (Design Guide)以避免應用上的品質問題。1.Relationship between Through Hole,Land, Cover Film, and Cover CoatNot Recommended(不建議...
分类:
其他好文 时间:
2015-01-14 09:42:00
阅读次数:
1027
问题描述:
Given an unsorted array, find the maximum difference between the successive elements in its sorted form.
Try to solve it in linear time/space.
Return 0 if the array contains less than 2 ele...
分类:
其他好文 时间:
2015-01-13 23:17:46
阅读次数:
330
问题描述:
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 ...
分类:
其他好文 时间:
2015-01-13 19:49:51
阅读次数:
152
ORACLE中用rownum分页并排序的SQL语句 以前分页习惯用这样的SQL语句: select * from (select t.*,rownum row_num from mytable t order by t.id) b where b.row_num between 1 and 10 结...
分类:
数据库 时间:
2015-01-13 15:37:16
阅读次数:
168
创建的数据库
现要对 Between '2015-1-12 00:00:00' AND '2015-1-12 23:00:00'之间的数据进行查找
没查到数据,是不是需要转换为datetime格式呢?
这样写select * from sensor_data where timestamp Between datetime('2015-1-12 00:00:00') AND d...
分类:
数据库 时间:
2015-01-13 12:31:00
阅读次数:
159
DescriptionGive a tree with n vertices,each edge has a length(positive integer less than 1001).Define dist(u,v)=The min distance between node u and v....
分类:
其他好文 时间:
2015-01-12 23:50:04
阅读次数:
222