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sql query modify the layout

Posted on 2011-02-26
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Last Modified: 2012-06-27
I have a table that has the following date
rank1        rank2   rank3           ID
1      NULL      NULL      112
NULL      2      NULL      112
NULL      NULL      NULL      112

I want to write a query that returns

ID   Rank1 Rank2 Rank3
112  1         2            Null
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Question by:Angela4eva
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7 Comments
 
LVL 31

Expert Comment

by:Wayne Barron
ID: 34990252
I am not sure about how to get it all on a single row, will have to continue looking in on it.
But to get everything that is not null.

from table where rank1 is not null or rank2 is not null or rank3 is not null.

That will return all rows, but to do it as a single row, that I am unsure of?

Carrzkiss
0
 
LVL 11

Expert Comment

by:dougaug
ID: 34990342
See if this works for you:


select ID,
       (select Rank1 from table t2 where Rank1 is not null and t2.ID = t1.ID) as Rank1,
       (select Rank2 from table t3 where Rank2 is not null and t3.ID = t1.ID) as Rank2,
       (select Rank3 from table t4 where Rank3 is not null and t4.ID = t1.ID) as Rank3
  from table t1
0
 
LVL 22

Assisted Solution

by:Thomasian
Thomasian earned 1000 total points
ID: 34990360
SELECT ID
      ,MAX(rank1) Rank1
      ,MAX(rank2) Rank2
      ,MAX(rank3) Rank3
FROM tablename
GROUP BY ID

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LVL 31

Expert Comment

by:Wayne Barron
ID: 34990404
@Thomasian
Simple and easy.
Will have to remember this one!

Carrzkiss
0
 
LVL 50

Expert Comment

by:Lowfatspread
ID: 34991432
did you want the max?
or something else

if you had
rank1        rank2   rank3           ID
1      NULL      NULL      112
NULL      2      NULL      112
NULL      NULL      NULL      112
3    null null 112

what would you want?

3 2 null 112  or something else
0
 
LVL 40

Accepted Solution

by:
Vadim Rapp earned 1000 total points
ID: 34991635
select
nullif(0,max(isnulll(rank1,0))),
nullif(0,max(isnulll(rank2,0))),
nullif(0,max(isnulll(rank3,0)))

from mytable
group by id
0
 

Author Closing Comment

by:Angela4eva
ID: 34992451
thanks
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