How should I organize a query of counts matching different criteria

Question

question

Rob Allen asked Feb 12, '10

How should I organize a query of counts matching different criteria

I am trying to write a query which produces a summary or statuses but my current attempt is ugly and takes too long (over a minute).

Given this sample data:

Name       ID      Status                    
---------------------------                    
 A         1         6                      
 A         2         6                    
 A         3         2                    
 B         4         2                    
 B         5         1                    
 C         6         1                    
 D         7         4                    
 D         8         6                    
 A         9         6                    
 B        10         1                    
 A        11         1

I want to produce this summary data:

Name     1    2    3   4   5   6                    
---------------------------------                    
 A       1    1    0   0   0   3                    
 B       2    1    0   0   0   0                    
 C       0    0    0   0   0   1                    
 D       0    0    0   1   0   6

How can I write this query so that it can stay fast and flexible?

sql-server-2005 t-sql select pivot aggregates

10 |1200

Attachments: Up to 2 attachments (including images) can be used with a maximum of 512.0 KiB each and 1.0 MiB total.

Answer 1 · 2010-02-12T17:12:34Z

TG answered Feb 12, '10

Assuming your status values don't change you can use PIVOT:

select p.Name,[1],[2],[3],[4],[5],[6]            
from YourTable            
pivot (count(id) for status in ([1],[2],[3],[4],[5],[6]) ) p

10 |1200

Attachments: Up to 2 attachments (including images) can be used with a maximum of 512.0 KiB each and 1.0 MiB total.

question