Solved

sql count if

Posted on 2014-04-09
6
296 Views
Last Modified: 2014-04-15
I am needing to look at a table and see if columns have a match.  I want to see if multiple employees have been clocked onto the same work order and operation.  I have the columns odd_no, Oper_no and empid.  for example I may have the work order number 123456 with operation number 10.  I want to COUNT how many different employees worked on that operation..
0
Comment
Question by:sharris_glascol
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 3
  • 2
6 Comments
 
LVL 66

Expert Comment

by:Jim Horn
ID: 39988988
SELECT COUNT(DISTINCT empid)
FROM your_table
WHERE odd_no = 123456 AND oper_no = 10

Open in new window

You'll want to look at the full data set just to make sure the above is correct, and any duplicate values are being handled

SELECT odd_no, oper_no, emp_id
FROM your_table
WHERE odd_no = 123456 AND oper_no = 10
ORDER BY odd_no, oper_no, emp_id

Open in new window

0
 

Author Comment

by:sharris_glascol
ID: 39988993
what if I want to look at all work orders and operations to see how many employees where clocked into the same one and not just one  exact work order?
0
 
LVL 66

Expert Comment

by:Jim Horn
ID: 39989017
Not entirely sure what you mean by 'the same one', but give this a whirl..

List...

SELECT odd_no, oper_no, emp_id
FROM your_table
ORDER BY odd_no, oper_no, emp_id

Open in new window

Count...

SELECT odd_no, oper_no, COUNT(emp_id) as empl_id_count
FROM your_table
GROUP BY odd_no, oper_no
ORDER BY odd_no, oper_no

Open in new window

0
Comparison of Amazon Drive, Google Drive, OneDrive

What is Best for Backup: Amazon Drive, Google Drive or MS OneDrive? In this free whitepaper we look at their performance, pricing, and platform availability to help you decide which cloud drive is right for your situation. Download and read the results of our testing for free!

 

Author Comment

by:sharris_glascol
ID: 39989044
Here is what i need to count

work order     operation number     employee number     count
12345                  10                                2321                           2
2468                      20                               1234                          2
12345                     10                               1234                         2
2468                       20                                2321                        2
13579                    10                                 2321                        1

This is kinda what I am looking for....
0
 
LVL 66

Expert Comment

by:Jim Horn
ID: 39989172
Nice mockup data.  Next time please add that to your original question, so we don't have to spend time flushing out requirements.

Based on the set above, give this a whirl, and add an ORDER BY clause to sort it by whatever is most readable..
SELECT 
   odd_no as work_order, 
   oper_no as operation_number, 
   emp_id as employee_number, 
   COUNT(emp_id) as empl_id_count
FROM your_table
GROUP BY odd_no, oper_no, emp_id

Open in new window

0
 
LVL 49

Accepted Solution

by:
PortletPaul earned 500 total points
ID: 39990666
Both sample data and expected results are best practice when asking this type of question. At this point I think we have the expected result but can deduce the sample data.

Jim is ever so close but I believe you need

COUNT() OVER()

to match that expected result. Like this:
    CREATE TABLE Your_Table
    	([odd_no] int, [Oper_no] int, [empid] int) 
    ;
    	
    INSERT INTO Your_Table
    	([odd_no], [Oper_no], [empid])
    VALUES
    	(12345, 10, 1234),
    	(12345, 10, 2321),
    	(13579, 10, 2321),
    	(2468, 20, 2321),
    	(2468, 20, 1234)
    ;

**Query 1**:

    SELECT
          odd_no                                           AS work_order
        , oper_no                                          AS operation_number
        , empid                                            AS employee_number
        , COUNT(empid) OVER (PARTITION BY odd_no, oper_no) AS empl_id_count
    FROM your_table
    ORDER BY
          odd_no,
          oper_no,
          empid
    

**[Results][2]**:
    
    | WORK_ORDER | OPERATION_NUMBER | EMPLOYEE_NUMBER | EMPL_ID_COUNT |
    |------------|------------------|-----------------|---------------|
    |       2468 |               20 |            1234 |             2 |
    |       2468 |               20 |            2321 |             2 |
    |      12345 |               10 |            1234 |             2 |
    |      12345 |               10 |            2321 |             2 |
    |      13579 |               10 |            2321 |             1 |

http://sqlfiddle.com/#!3/4002c/1

Open in new window

0

Featured Post

How Do You Stack Up Against Your Peers?

With today’s modern enterprise so dependent on digital infrastructures, the impact of major incidents has increased dramatically. Grab the report now to gain insight into how your organization ranks against your peers and learn best-in-class strategies to resolve incidents.

Question has a verified solution.

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

Although it can be difficult to imagine, someday your child will have a career of his or her own. He or she will likely start a family, buy a home and start having their own children. So, while being a kid is still extremely important, it’s also …
Today, the web development industry is booming, and many people consider it to be their vocation. The question you may be asking yourself is – how do I become a web developer?
In this fifth video of the Xpdf series, we discuss and demonstrate the PDFdetach utility, which is able to list and, more importantly, extract attachments that are embedded in PDF files. It does this via a command line interface, making it suitable …
Simple Linear Regression

728 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