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Neeq a SQL query

Posted on 2011-03-10
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Last Modified: 2012-06-27
Experts,
As per my attachment, could you please get me a query?
Thanks in advance.
test.docx
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Question by:Tpaul_10
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9 Comments
 
LVL 9

Expert Comment

by:sshah254
ID: 35100479
What decides if 1233 or 1234 from Table1 should be selected?

Ss
0
 
LVL 32

Assisted Solution

by:Ephraim Wangoya
Ephraim Wangoya earned 50 total points
ID: 35100520

select A.Column1, b.Column1, MAX(A.Column3) [Column3]
from Table1 A
inner join Table2 B on B.Column1 = A.Column2
group by A.Column1, b.Column1
0
 
LVL 143

Expert Comment

by:Guy Hengel [angelIII / a3]
ID: 35100522
I presume you need to review the specs ... because I don't see an explanation why table2 is actually needed, and I see no explanation on why row2 from table1 is returned and why not row1.

meanwhile, you might want to read this article, I presume it will help you:
http://www.experts-exchange.com/A_3203.html
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LVL 32

Expert Comment

by:Ephraim Wangoya
ID: 35100557
My mistake


select MAX(A.Column1) [Table1 Column1], B.Column1 [table2 Column1], MAX(A.Column3) [Column3]
from Table1 A
inner join Table2 B on B.Column1 = A.Column2
group by B.Column1
0
 

Author Comment

by:Tpaul_10
ID: 35100585
Basically I need the max value from table1 and for some rows, it is returning the both the rows even though I have used max(column1) in my query. Not sure why
Thanks
0
 
LVL 9

Expert Comment

by:sshah254
ID: 35100600
ewangoya,

We don't know why he is selecting one row over the other - maybe it should be max, maybe min, maybe first, maybe last ... :-)

Ss
0
 
LVL 32

Expert Comment

by:Ephraim Wangoya
ID: 35100654

A quick look at the results tells me its max values
0
 
LVL 41

Accepted Solution

by:
Sharath earned 200 total points
ID: 35101245
try this.
SELECT t1.Column1, 
       t2.Column1, 
       t1.Column3 
  FROM table1 t1 
       JOIN (  SELECT Column2, 
                      MAX(Column1) Column1 
                 FROM table1 
             GROUP BY Column2) AS t11 
         ON t1.Column1 = t11.Column1 
            AND t1.Column2 = t11.Column2 
       JOIN table2 t2 
         ON t1.Column2 = t2.Column2

Open in new window

0
 

Author Closing Comment

by:Tpaul_10
ID: 35110909
Thanks for all your help guys and just to let you know I don't have to review my specs since it was pretty straight forward and I didn't specify all the columns in my tables and I wanted the maximum value.

Sharath's solution gave me the correct results. once again THANKS to all for quick response.
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