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数据库分页
Mysql分页采用limt关键字select*fromt_orderlimit5,10;#返回第6-15行数据select*fromt_order limit5;#返回前5行select*fromt_order limit0,5;#返回前5行Mssql 2000分页采用top关键字(20005以上版...
分类:数据库   时间:2014-11-06 19:36:48    阅读次数:207
Sort Colors
Given an array withnobjects colored red, white or blue, sort them so that objects of the same color are adjacent, with the colors in the order red, wh...
分类:其他好文   时间:2014-11-06 17:15:17    阅读次数:159
Remove Element
Given an array and a value, remove all instances of that value in place and return the new length.The order of elements can be changed. It doesn't mat...
分类:其他好文   时间:2014-11-06 14:40:59    阅读次数:117
sql分页比较简单快捷的方法
SELECT TOP 显示数量* FROM 表 WHERE (主键id>(SELECT MAX(主键id) FROM(SELECT TOP 页码数*显示数量 主键id FROM 表 ORDER BY 主键id) as t ) )ORDER BY主键id注:如果页码数为第一页,则不要where条件,....
分类:数据库   时间:2014-11-06 14:21:02    阅读次数:203
Binary Tree Level Order Traversal
Given a binary tree, return thelevel ordertraversal of its nodes' values. (ie, from left to right, level by level).For example:Given binary tree{3,9,2...
分类:其他好文   时间:2014-11-06 12:33:23    阅读次数:117
What are the 10 algorithms one must know in order to solve most algorithm challenges/puzzles?
QUESTION :What are the 10 algorithms one must know in order to solve most algorithm challenges/puzzles?ANSWER:Dynamic Programming (DP)appears to accou...
分类:其他好文   时间:2014-11-06 10:34:17    阅读次数:245
Leetcode:Binary_Tree_Level_Order_Traversal_II
给定一个二叉树,由自底向上的层次顺序遍历返回其节点的值。...
分类:其他好文   时间:2014-11-06 00:44:14    阅读次数:209
SqlServer 第31到第40条记录的各种玩法
--两次对表A查询效率较低select top 10 * from A where ID not in (select top 30 ID from A)--外层查询没有对表A查询,效率大有提高select top 10 * from (select top 40 * from A order by...
分类:数据库   时间:2014-11-05 23:01:54    阅读次数:201
c#解决数据库用in的时候大于1000报错问题
问题://oracle数据库报错delete from DD_ORDER_DETAIL where ORDERID=in(0,1,2,3,4,5,6,7.....1001);View Codec#写了一个方法解决/// /// 拼接sql /// ///...
分类:数据库   时间:2014-11-05 21:10:42    阅读次数:176
查询优化原则
1.对查询进行优化,应尽量避免全表扫描,首先应考虑在 where 及 order by 涉及的列上建立索引。2.应尽量避免在 where 子句中对字段进行 null 值判断,否则将导致引擎放弃使用索引而进行全表扫描,如: select id from t where num is null 可以.....
分类:其他好文   时间:2014-11-05 17:06:23    阅读次数:228
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