Solved

Crosstab function

Posted on 2009-05-15
6
219 Views
Last Modified: 2012-05-07
I have data in a table like this:

Level1      Level2       Level3       Level4       Error
--------      --------       --------       --------       ------
Red1        Red2          Red3         Red4         E
Red1        Red2          Red3         Red4         E
Red1        Red2          Red3         Red4         E
Red1        Red2          Red3         Red4         A
Red1        Red2          Red3         Red4         A
Red1        Red2          Red3         Blue4        E
Red1        Red2          Blue3        Blue4        W
Red1        Red2          Blue3        Blue4        W
Red1        Red2          Red3         Blue4        A

I need a function to give a cross tab counts result like the following:

Level1      Level2       Level3       Level4       Error_A     Error_E      Error_W
--------      --------       --------       --------       ---------      ---------      ----------
Red1        Red2          Red3         Red4         2                3
Red1        Red2          Red3         Blue4         1                1
Red1        Red2          Blue3        Blue4                                              2
0
Comment
Question by:Fairfield
  • 2
  • 2
  • 2
6 Comments
 
LVL 26

Accepted Solution

by:
tigin44 earned 500 total points
ID: 24396693
try this
select level1, level2, level3, level4,
   sum(case when error = 'A' tthen 1 else 0 end) as error_A,
   sum(case when error = 'E' tthen 1 else 0 end) as error_E,
   sum(case when error = 'W' tthen 1 else 0 end) as error_W
from yourTbale
group by level1, level2, level3, level4

Open in new window

0
 

Author Comment

by:Fairfield
ID: 24396769
Do I use this in a function or as a select statement in a query?  If in a function, can you tell me how to use it?
0
 
LVL 57

Expert Comment

by:Raja Jegan R
ID: 24396825
Use Pivot Function for better performance
SELECT Level1, Level2, Level3, Level4, [A] AS Error_A,[E] AS Error_E,[W] AS Error_W
FROM (
SELECT Level1, Level2, Level3, Level4, Error
FROM urtable) ps
PIVOT
(count (level1)
FOR Error IN
( [A], [E], [W])
) AS pvt

Open in new window

0
Enterprise Mobility and BYOD For Dummies

Like “For Dummies” books, you can read this in whatever order you choose and learn about mobility and BYOD; and how to put a competitive mobile infrastructure in place. Developed for SMBs and large enterprises alike, you will find helpful use cases, planning, and implementation.

 
LVL 57

Expert Comment

by:Raja Jegan R
ID: 24396832
You can use this as part of your SELECT statement itself. No Need for any functions to handle this
0
 
LVL 26

Expert Comment

by:tigin44
ID: 24396834
you can use as you needed.
if you want you may put the select staement into a funtion and call taht function when you need it.
0
 

Author Comment

by:Fairfield
ID: 24396967
rrjegan17:
I am receiving and error when using your solution



Msg 207, Level 16, State 1, Line 1
Invalid column name 'Level1'.
0

Featured Post

Efficient way to get backups off site to Azure

This user guide provides instructions on how to deploy and configure both a StoneFly Scale Out NAS Enterprise Cloud Drive virtual machine and Veeam Cloud Connect in the Microsoft Azure Cloud.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

In this article we will get to know that how can we recover deleted data if it happens accidently. We really can recover deleted rows if we know the time when data is deleted by using the transaction log.
Ever needed a SQL 2008 Database replicated/mirrored/log shipped on another server but you can't take the downtime inflicted by initial snapshot or disconnect while T-logs are restored or mirror applied? You can use SQL Server Initialize from Backup…
Two types of users will appreciate AOMEI Backupper Pro: 1 - Those with PCIe drives (and haven't found cloning software that works on them). 2 - Those who want a fast clone of their boot drive (no re-boots needed) and it can clone your drive wh…
Nobody understands Phishing better than an anti-spam company. That’s why we are providing Phishing Awareness Training to our customers. According to a report by Verizon, only 3% of targeted users report malicious emails to management. With compan…

776 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question