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Need to select two distinct columns in my recordset

Posted on 2012-04-12
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Last Modified: 2012-04-13
I have one table named AttendanceGrid:

Here are an example of the data and column names

Name   Activity   Start          Stop       Month      Notes

Bobby      Tennis    12:00pm   2:00pm   January     None
Timmy     Tennis    12:00pm   2:00pm   February     None
Joyce        Tennis    1:00pm    3:00pm    February     None
Dennis     Tennis    12:00pm   2:00pm   January     None
Sue          Tennis    1:00pm     3:00pm   January     None
Bart         Soccer   12:00pm   2:00pm   January     None

I would like to select Distinct Activity records associated with the Start and Stop Time.  For example if I selected distinct Activity associated with Start and Stop times I should be able to pull up the following:

Tennis   12:00pm  2:00pm
Tennis   1:00pm    3:00pm
Soccer   12:00pm   2:00pm

How can I write an SQL statement to do that?  I am quite novice to SQL code
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Question by:al4629740
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6 Comments
 
LVL 14

Accepted Solution

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nishant joshi earned 668 total points
ID: 37839184
select  Activity,MAX(Start),MAX(Stop) from tbl group by Activity

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LVL 23

Assisted Solution

by:wdosanjos
wdosanjos earned 668 total points
ID: 37839210
Perhaps:
select distinct Activity, Start, Stop
  from AttendanceGrid

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Author Comment

by:al4629740
ID: 37839626
What does the Max in  MAX(Start) mean?
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LVL 14

Expert Comment

by:nishant joshi
ID: 37844062
max which is an aggregate function.
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Author Comment

by:al4629740
ID: 37844975
what does it do?
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LVL 75

Assisted Solution

by:Anthony Perkins
Anthony Perkins earned 664 total points
ID: 37845444
Here is what SQL Server's BOL states about MAX():

Returns the maximum value in the expression.
...
For character columns, MAX finds the highest value in the collating sequence.
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