Oracle中有sequence的功能,SQL
Server类似的功能使用Identity列实现,但是有很大的局限性。在2012中,微软终于增加了sequence 对象,功能和性能都有了很大的提高。sql
server 2012 序列配置属性1. 查询序列的下一个值select next value...
分类:
数据库 时间:
2014-05-08 19:35:44
阅读次数:
446
首先是行标题列rowheaderdataGridView1.TopLeftHeaderCell.Value =
"details";_______________________________________________________有的时候在datagridview中手动添加列的时候,就算...
declare @id int,@value nvarchar(100);begin declare
c_test_main cursor fast_forward for select hps_hpId,hps_time from
hospitalPermSupp where hps_...
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数据库 时间:
2014-05-08 14:39:27
阅读次数:
498
2520 is the smallest number that can be divided
by each of the numbers from 1 to 10 without any remainder.What is the smallest
positive number that is...
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其他好文 时间:
2014-05-08 14:36:50
阅读次数:
248
The first motivation for constseems to have
been to eliminate the use of preprocessor #definefor value substitution. It has
since been put to use for ...
分类:
编程语言 时间:
2014-05-08 13:14:07
阅读次数:
496
IntroductionThis article is part of the ongoing
series I’ve been writing recently, but can be read as a standalone article. I’m
going to do a better j...
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其他好文 时间:
2014-05-08 13:01:13
阅读次数:
599
CH1-3:处理数据 1 列表初始化 char c={31325};不允许缩窄 char
c={66}; char c={x};不能为变量 2 强制类型转换 (typename) value typename (value) static_cast
(value) 更加严格 CH4:复合类型 1 s...
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编程语言 时间:
2014-05-08 11:56:13
阅读次数:
377
这真是一个耗CPU的运算,怪不得现在因式分解和素数查找现在都用于加密运算。By listing the
first six prime numbers: 2, 3, 5, 7, 11, and 13, we can see that the 6th prime
is 13.What is the 1...
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其他好文 时间:
2014-05-08 11:54:49
阅读次数:
260
一、Combiner作用1、combiner最基本是实现本地key的聚合,对map输出的key排序,value进行迭代。如下所示:map: (K1, V1) →
list(K2, V2)combine: (K2, list(V2)) → list(K2, V2)reduce: (K2, list(V...
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其他好文 时间:
2014-05-08 09:37:49
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472
java.lang.Integer can not be cast to java.lang.Long...
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编程语言 时间:
2014-05-07 22:41:30
阅读次数:
329