Adding a min, max and avg column

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Adding a min, max and avg column

Jimmy123

SSC Veteran

Points: 200
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March 18, 2013 at 4:11 pm

#291244

I have a table like so.
Table A
[Job Lot] [Job ID] [Child Job ID] [Time Completed] [Order of Jobs Done]
1 11 100 10 Pos 1
1 11 101 20 Pos 2
1 11 103 30 Pos 3
2 12 101 30 Pos 1
2 12 105 10 Pos 3
Each Child Job ID represents a delivery to a particular site like New York, Washington or LA each week.
So I need to work work out say for Child ID 101 what is the average postion . I see in JOB ID 11 it has Child Job ID 100 in POS 2 and in JOB ID 12 it is in POS 1, so the min is POS1 , the max is POS2, and the average is POS 1.5. So what is the spread of CHILD JOB ID and position is the real question , so out of 4 CHILD JOB IDS of say 101 what is the spread, is it always usuallt at postion 1.
For CHILD JOB ID 10 , I want the lowest rank of Position 0 , the highest rank value of Position 3 and the Average vlaue not considering any null values and only divide by number of non null vlaues. In this case the the average rank would be Postion 2.
So I need to add 3 columns to store these values ? How can I do this in one query ? Do I need to pivot the data first ?
SELECT [JOB LOT],[CHILD JOB ID], MIN([ORDER OF JOBS DONE])AS [MIN],MAX([ORDE OF JOBS DONE])AS [MAX]
FROM TABLE A WHERE [ORDER OF JOBS DONE] IS NOT NULL group by [JOB LOT],[ORDER OF JOBS DONE]

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Jeff Moden SSC Guru Points: 1003853 More actions · Answer 1

Your post is a bit confusing. According to what you posted, the "Child ID 10" is actually in a column called "[Time Completed]".

Take a look at the first link in my signature on how to post readily consumable data so you can get good answers very quickly. If it's not readily consumable data, you might not get coded answers.

--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.

Change is inevitable... Change for the better is not.

Helpful Links:
How to post code problems
How to Post Performance Problems
Create a Tally Function (fnTally)

Steve Jones - SSC Editor SSC Guru Points: 734418 More actions · Answer 2

As Jeff mentioned, this is confusing. For Job ID 11, I see a 100 as Position 1, not 2. Or am I missing something?