SQL Pivot

Posted on 2013-05-21
Last Modified: 2013-05-21
How can I do a select on a Specialties table and a states table

Specialties table has
SpecialtyID     StateID

States table has
StateID     StateName (Varchar(2))

So that I have this output

SpecialtyID   AK               AL   AZ   etc....
data              count(AK)   etc...
Question by:lrbrister
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LVL 41

Assisted Solution

Sharath earned 500 total points
ID: 39185296
try this
select *
  from (
		select s1.SpecialtyID,s2.StateName
		  from Specialties s1
		  join States s2 on s1.StateID = s2.StateID) t1
 pivot (count(StateName) for StateName in ([AK],[AL],[AZ])) p		  

Open in new window!3/75dc7/1
LVL 41

Accepted Solution

Sharath earned 500 total points
ID: 39185324
You can do it dynamically if you have lot of states.
 declare @select varchar(max)
select @select = STUFF((select distinct ',' + quotename(StateName, '')
from States
for XML PATH('')
),1,1,'' )

select @select = 'select *
  from (
		select s1.SpecialtyID,s2.StateName
		  from Specialties s1
		  join States s2 on s1.StateID = s2.StateID) t1
 pivot (count(StateName) for StateName in ('+@select+')) p'

Open in new window!3/e12ec/1

Author Closing Comment

ID: 39185477
Great answers
Watch for follow-up.  I messed this question up actually
LVL 41

Expert Comment

ID: 39185584
post your follow-up question

Author Comment

ID: 39185594

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