原文:05. 取SQL分组中的某几行数据对表中数据分组,有时只需要某列的聚合值;有时却需要返回整行数据,常用的方法有:子查询、ROW_NUMBER、APPLY,总体感觉还是ROW_NUMBER比较直观。测试数据:if OBJECT_ID('testGroup') is not nulldrop ta...
分类:
数据库 时间:
2014-06-25 23:30:14
阅读次数:
369
Impact crusher is a new crushing equipment taking advantages of impact effect to crush materials, which has such features as big reduction ratio, high...
分类:
其他好文 时间:
2014-06-25 23:12:07
阅读次数:
258
--API 名称soa_ap_invoice--导入数据日志查询SELECT * FROM soa_invoice_backup sib, soa_invoice_lines_backup silbWHERE sib.batch_number = silb.batch_number AND sib....
分类:
其他好文 时间:
2014-06-25 22:40:05
阅读次数:
241
The gray code is a binary numeral system where two successive values differ in only one bit.Given a non-negative integernrepresenting the total number...
分类:
其他好文 时间:
2014-06-25 22:07:58
阅读次数:
330
SQL Server 2005引入的新方法。1 SELECT * FROM (SELECT ROW_NUMBER() OVER(ORDER BY keyField DESC) AS rowNum, * FROM tableName) AS t WHERE rowNum > start[比如:90] ...
分类:
数据库 时间:
2014-06-25 21:17:08
阅读次数:
256
typeof(1): numbertypeof(NaN): numbertypeof(Number.MIN_VALUE): numbertypeof(Infinity): numbertypeof("123"): stringtypeof(true): booleantypeof(window): ...
分类:
编程语言 时间:
2014-06-25 20:57:22
阅读次数:
295
/*API-141*/Raphael.pathIntersection(path1, path2)获取两条线的交点参数列表:path1 字符串类型 路径的字符串表达形式path2 字符串类型 路径的字符串表达形式返回值:交点集合,格式如下:[{ x: //number类型 点的x坐标 y: //nu...
Problem DescriptionSome days ago, I learned the concept of LCM (least common multiple). I've played with it for several times and I want to make a big...
分类:
其他好文 时间:
2014-06-24 15:01:58
阅读次数:
168
原来写的一个分页查询,回调了好几层。exports.list = function(req,res) { var params = {}; var current_page = common_util.get_param_value(req,'current_page','Number'...
分类:
Web程序 时间:
2014-06-24 12:41:15
阅读次数:
353
我们来看Interfaces ofport: OpenFlow port number for this interface. type: system: An ordinary network device, e.g. eth0 on Linux. internal: A simulated ne...
分类:
其他好文 时间:
2014-06-24 12:23:51
阅读次数:
316