where,group by,having重新详解 where的用法: where与in的配合使用,in(值1,值2,。。。)表示结果在值1,值2,。。。其中任何一个。 聚合函数和group by的用法: 聚合函数:在有聚合函数的select 字句中,出现其他的列名是没有意义的...
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数据库 时间:
2014-09-13 10:31:44
阅读次数:
251
Group
Time Limit: 4000/2000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others)
Total Submission(s): 1323 Accepted Submission(s): 703
Problem Description
There are n men ,every ma...
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其他好文 时间:
2014-09-12 23:30:34
阅读次数:
461
Join the ServiceStack Google+ group?or follow?@servicestack?for updates. A Fast, Simple, Typed ORM for .NET OrmLite‘s goal is to provide a convenient, DRY, config-free, RDBMS-agnostic typed wra...
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Web程序 时间:
2014-09-12 17:28:04
阅读次数:
422
CREATE OR REPLACE PROCEDURE PR_MOD_BASE IScursor c_base ISSELECT MIN(INVENTORY_DATE) IDATE,KUNNR,MATNR FROM STOCK_BASE_DATA GROUP BY TO_CHAR(INVENTORY...
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数据库 时间:
2014-09-12 14:59:03
阅读次数:
236
Problem Description
The French author Georges Perec (1936–1982) once wrote a book, La disparition, without the letter 'e'. He was a member of the Oulipo group. A quote from the book:
Tout avait Pa...
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其他好文 时间:
2014-09-12 10:16:23
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245
Hello,I'm Jack Ma,founder and chairman of Alibaba Group.15 years ago,18 founders in my apartment had a dream,that someday,we can build up a company th...
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其他好文 时间:
2014-09-12 08:50:43
阅读次数:
159
SELECT R.* FROM trans_flow R, (SELECT order_no, MAX(status_time) AS status_time FROM trans_flow GROUP BY order_no) S WHERE R.order_no = S.order_no AN....
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数据库 时间:
2014-09-11 19:01:02
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226
spark:Cross-platform real-time collaboration client optimized for business and organizations.Spark is a full-features instant messaging (IM) and group...
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其他好文 时间:
2014-09-11 13:43:01
阅读次数:
209
在 shell command line 中,一般人或许不太计较 ( ) 与 { } 这两对符号的差异,
虽然两者都可将多个命令作群组化处理,但若从技术细节上,却是很不一样的:
( ) 将 command group 置于 sub-shell 去执行,也称 nested sub-shell。
{ } 则是在同一个 shell 内完成,也称为 non-named command group。...
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其他好文 时间:
2014-09-11 11:19:41
阅读次数:
201