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SQL - Vertica: How to generate daily rows with most previous date data

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问题 I have a base table like below: score_upd (Upd_dt,Url,Score) AS ( SELECT DATE '2019-07-26','A','x' UNION ALL SELECT DATE '2019-07-26','B','alpha' UNION ALL SELECT DATE '2019-08-01','A','y' UNION ALL SELECT DATE '2019-08-01','B','beta' UNION ALL SELECT DATE '2019-08-03','A','z' UNION ALL SELECT DATE '2019-08-03','B','gamma' ) Upd_dt URL Score 2019-07-26 A x 2019-07-26 B alpha 2019-08-01 A y 2019-08-01 B beta 2019-08-03 A z 2019-08-03 B gamma And I want to create a table in daily-url level,

How to use mock object mimicing a daily routine program?

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问题 My program has a daily routine, similar to an alarm clock event. Say, when it's 2pm(The time is the system time in my pc), do something for me. What I want to do is to speed up the testing period(I don't really want to wait 4 days looking at the daily routine and check errors.) I read on wiki of Mock object, the writer DID mention alarm clock program. I was so happy to see but still, don't know how to do it. I am new to Mock Object, and I am programming in Java. So JMock or EasyMock(or any

Tools to help a small shop score higher on the “Joel Test”

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问题 Questions #1 through #4 on the Joel Test in my opinion are all about the development tools being used and the support system in place for developers: Do you use source control? Can you make a build in one step? Do you make daily builds? Do you have a bug database? I'm just curious what free/cheap (but good) tools exist for the small development shops that don't have large bank accounts to use to achieve a positive answer on these questions. For source control I know Subversion is a great

Tools to help a small shop score higher on the “Joel Test”

阅读更多关于 Tools to help a small shop score higher on the “Joel Test”

Questions #1 through #4 on the Joel Test in my opinion are all about the development tools being used and the support system in place for developers: Do you use source control? Can you make a build in one step? Do you make daily builds? Do you have a bug database? I'm just curious what free/cheap (but good) tools exist for the small development shops that don't have large bank accounts to use to achieve a positive answer on these questions. For source control I know Subversion is a great solution, and if you are a one man shop you could even use SourceGear's Vault . I use NAnt for my larger