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SQL Crosstab query without using transform - subquery

Posted on 2009-07-16
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Last Modified: 2012-06-27
I am trying to perform a subquery or transform of sorts using SQL Server.  I think I have done something similar in Oracle, but cannot locate it.

The actual query I am working on pulls about 50 fields from 7 tables and I would like to avoid a huge "group by" statement.  All table except the transaction tables have single records per employee, but the transaction table can have many records.
select emp.name, emp.department, dept.deptname, emp.manager, mgr.name, other.field,
 

(Select 

   trans.emp

   sum(case when trans.acct = 'Travel' then trans.tranamt else 0 end) as 'Travel',

   sum(case when trans.acct = 'Meals' then trans.tranamt else 0 end) as 'Meals',

   sum(case when trans.acct = 'Airfare' then trans.tranamt else 0 end) as 'Airfare'

   from transactions trans

   where trans.employee = emp.employee

   group by trans.emp )
 

from

   employees emp

   left join departments dept on emp.department = dept.department

   left join employees mgr on emp.manager = mgr.employee

   left join AnotherTable other on emp.employee = other.employee

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Question by:jransom2
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Expert Comment

by:Hwkranger
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A while ago, I found something similiar to this:

http://weblogs.sqlteam.com/jeffs/articles/5120.aspx

I use the original crosstab they wrote, but this works just as well.
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Ernariash earned 500 total points
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Hope this will help. Thanks...

select emp.name, emp.department, dept.deptname, emp.manager, mgr.name, other.field,

(Select   sum(trans.tranamt)

   from transactions trans

   where trans.employee = emp.employee and  trans.acct = 'Travel')  as 'Travel' ,

 (Select   sum(trans.tranamt)

   from transactions trans

   where trans.employee = emp.employee and  trans.acct = 'Meals')  as 'Meals'   ,

 (Select   sum(trans.tranamt)

   from transactions trans

   where trans.employee = emp.employee and  trans.acct = 'Airfare')  as 'Airfare'  

 

from

   employees emp

   left join departments dept on emp.department = dept.department

   left join employees mgr on emp.manager = mgr.employee

   left join AnotherTable other on emp.employee = other.employee

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Author Closing Comment

by:jransom2
Comment Utility
Beautiful... I knew it was going to be something simple.
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