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tsql code

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debris_flow
debris_flow
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Imagine a table which contains records for all weekly number of bugs
discovered by each QA analysts in the team for one year. Please describe a
simple SQL statement for identifying a winner (an employee who found the
biggest number of bugs during that year) by writing one statement?
ChrisM@home
ChrisM@home
Ten Centuries
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debris_flow (7/6/2012)
Imagine a table which contains records for all weekly number of bugs
discovered by each QA analysts in the team for one year. Please describe a
simple SQL statement for identifying a winner (an employee who found the
biggest number of bugs during that year) by writing one statement?


This is a simple exercise made difficult by having to imagine what the table and data look like. Read the link in my sig "please read this" and provide DDL for the table and DML for some sample data.
Otherwise you may have to imagine what the simple SQL statement might look like ;-)


Low-hanging fruit picker and defender of the moggies





For better assistance in answering your questions, please read this.




Understanding and using APPLY, (I) and (II) Paul White

Hidden RBAR: Triangular Joins / The "Numbers" or "Tally" Table: What it is and how it replaces a loop Jeff Moden
debris_flow
debris_flow
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Thank you very much for your suggestion
Jeff Moden
Jeff Moden
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debris_flow (7/6/2012)
Imagine a table which contains records for all weekly number of bugs
discovered by each QA analysts in the team for one year. Please describe a
simple SQL statement for identifying a winner (an employee who found the
biggest number of bugs during that year) by writing one statement?


This is a terrible homework problem. :-P It doesn't tell you what to do if there's a tie. ;-)

Some hints to solve this (and there are many different ways). Lookup the following in Books Online.

GROUP BY
SUM()
MAX()
ORDER BY
COMMON TABLE EXPRESSIONS (CTEs)
RANK()/DENSERANK()
ROW_NUMBER()

--Jeff Moden

RBAR is pronounced ree-bar and is a Modenism for Row-By-Agonizing-Row.
First step towards the paradigm shift of writing Set Based code:
Stop thinking about what you want to do to a row... think, instead, of what you want to do to a column.
Although they tell us that they want it real bad, our primary goal is to ensure that we dont actually give it to them that way.
Although change is inevitable, change for the better is not.
Just because you can do something in PowerShell, doesnt mean you should. Wink

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