select top 1 id from AddWorkFlow order by id desc返回查询结果中前几条数据select count(1) as total from Base_Users where DeptId='101010102' and iDel=0返回查询的记录个数sele...
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数据库 时间:
2014-06-23 06:31:15
阅读次数:
247
--查询权限函数--1declare @names varchar(3000)set @names=''select @names=@names+isnull(AdminPermissFormName,'')+' , ' from BookAdminPermissTypeList where Ad....
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数据库 时间:
2014-06-23 00:11:08
阅读次数:
302
DASH Basics: MPD and Segments
Let’s quickly summarize how a DASH content is made of:
MPD: an XML document describing where the various media resources present in the content are located. The med...
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其他好文 时间:
2014-06-22 19:30:15
阅读次数:
232
1、NULL是什么?
NULL表示UNKNOW(未知),其不代表任何值。例如一行中某列没有任何值即为NULL。
ORACLE允许任何一种数据类型的字段为空,除了以下两种情况:
1)主键字段(primary key),
2)定义时已经加了NOT NULL限制条件的字段
2、NULL有什么用?
1)NULL可用于条件判断:
SELECT * FROM EMP WHERE CO...
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数据库 时间:
2014-06-22 15:06:20
阅读次数:
477
Description
Let S = s1 s2...s2n be a well-formed string of parentheses. S can be encoded in two different ways:
q By an integer sequence P = p1 p2...pn where pi is the number of left parentheses...
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其他好文 时间:
2014-06-22 14:06:49
阅读次数:
249
Convert Sorted List to Binary Search Tree
Total Accepted: 12283 Total
Submissions: 45910My Submissions
Given a singly linked list where elements are sorted in ascending order, convert it...
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其他好文 时间:
2014-06-21 23:57:00
阅读次数:
351
Given a binary tree and a sum, find all root-to-leaf paths where each path's sum equals the given sum.
For example:
Given the below binary tree and sum = 22,
5
/ ...
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其他好文 时间:
2014-06-21 22:44:58
阅读次数:
266
5个核心的SQL语句1.SELECT-查询语句的逻辑处理顺序5 SELECT 1 FROM 1.1 FROM JOIN ON 2 WHERE 3 GROUP BY 4 HAVING 6 ORDER BY -FROM子句: 处理联结语句的顺序1、交叉联结,也称笛卡尔积;2、内联结;3、外联结。-GRO...
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数据库 时间:
2014-06-21 17:40:51
阅读次数:
440
Valid SudokuDetermine if a Sudoku is valid, according to: Sudoku Puzzles - The Rules.The Sudoku board could be partially filled, where empty cells are...
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其他好文 时间:
2014-06-21 16:40:45
阅读次数:
280
SELECT a.id,b.name FROM tab1 AS a LEFT JOIN tab2 AS b ON(a.id = p.id) WHERE a.id > 10以上sql返回的结果中name列也许会出现 null 的情况,那么在name字段上使用什么函数可以将出现的 null 改为一个默认...
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其他好文 时间:
2014-06-21 14:27:50
阅读次数:
194