Solved

Counting DISTINCT Values using SQL

Posted on 2013-10-26
7
361 Views
Last Modified: 2013-10-26
Hello,

I have the following code. I am trying to count the number of DISTINCT customers that each PolRep has.


SELECT
      PolRep,
       CustNo
    , count(DISTINCT CustNo) AS Count_CustNo
    
FROM In_Force_Policy_Book_of_Business AS Name
GROUP BY
      PolRep
;

Open in new window

0
Comment
Question by:Newbi22
7 Comments
 
LVL 28

Expert Comment

by:Bill Bach
ID: 39602899
Looks good, except for the use of "CustNo" in the SELECT list.  Remove that and the query should run great.
0
 

Author Comment

by:Newbi22
ID: 39602918
Ok.. I did that and now I get the following

The SELECT statement includes a reserved word or an argument name that is misspelled or missing, or the punctuation is incorrect. Exception SQL State=37000 Exception vendor error code=-3504

SELECT

      PolRep,

     ,count(DISTINCT CustNo) AS count_CustNo
    
FROM In_Force_Policy_Book_of_Business AS Name

GROUP BY
      PolRep

;

Open in new window

0
 
LVL 29

Expert Comment

by:IrogSinta
ID: 39602947
Name is a reserved word.  Try this:

SELECT
      PolRep,
     ,Count(DISTINCT CustNo) AS count_CustNo    
FROM In_Force_Policy_Book_of_Business 
GROUP BY
      PolRep
;

Open in new window

0
Master Your Team's Linux and Cloud Stack!

The average business loses $13.5M per year to ineffective training (per 1,000 employees). Keep ahead of the competition and combine in-person quality with online cost and flexibility by training with Linux Academy.

 

Author Comment

by:Newbi22
ID: 39602953
Sorry, but still not working....

This works, without the count..

SELECT

      PolRep

FROM In_Force_Policy_Book_of_Business 

GROUP BY
      PolRep
;

Open in new window




But this will not work....

SELECT
      PolRep,
     ,Count(DISTINCT CustNo) AS count_CustNo    
FROM In_Force_Policy_Book_of_Business 
GROUP BY
      PolRep
;

Open in new window




I am modeling it from the following query that works. It joins I assume because the counting part is from a different table.


SELECT
      Carrier
       ClientLastName
    , count(DISTINCT Client_Last_Name) AS count_ClientLastName
    
FROM NewBusinessHeader AS H
INNER JOIN NewBusinessLineItem AS I ON h.NBHeaderID = I.NBHeaderID

Open in new window

0
 
LVL 92

Accepted Solution

by:
Patrick Matthews earned 500 total points
ID: 39603175
Too many commas.  Change:

SELECT
      PolRep,
     ,Count(DISTINCT CustNo) AS count_CustNo    
FROM In_Force_Policy_Book_of_Business 
GROUP BY
      PolRep
;

Open in new window


to:

SELECT
      PolRep
     ,Count(DISTINCT CustNo) AS count_CustNo    
FROM In_Force_Policy_Book_of_Business 
GROUP BY
      PolRep
;

Open in new window

0
 

Author Closing Comment

by:Newbi22
ID: 39603228
Thanks for the help I appreciate the detail.
0
 
LVL 92

Expert Comment

by:Patrick Matthews
ID: 39603240
Newbi22,

Glad to help, and thanks for the points.  That said, I think the other two Experts made a contribution here, and a split may have been more appropriate: BillBach was correct in identifying the problem with your SELECT clause, and IrogSinta was correct about your use of a reserved word. in the FROM clause.

If you click Request Attention, you can ask a Moderator to reopen the question so you can re-do it as a split.

Cheers,

Patrick
0

Featured Post

VMware Disaster Recovery and Data Protection

In this expert guide, you’ll learn about the components of a Modern Data Center. You will use cases for the value-added capabilities of Veeam®, including combining backup and replication for VMware disaster recovery and using replication for data center migration.

Question has a verified solution.

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

Suggested Solutions

Introduction Since I wrote the original article about Handling Date and Time in PHP and MySQL (http://www.experts-exchange.com/articles/201/Handling-Date-and-Time-in-PHP-and-MySQL.html) several years ago, it seemed like now was a good time to updat…
Introduction This article is intended for those who are new to PHP error handling (https://www.experts-exchange.com/articles/11769/And-by-the-way-I-am-New-to-PHP.html).  It addresses one of the most common problems that plague beginning PHP develop…
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…
With Secure Portal Encryption, the recipient is sent a link to their email address directing them to the email laundry delivery page. From there, the recipient will be required to enter a user name and password to enter the page. Once the recipient …

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