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Selecting DISTINCT


Selecting DISTINCT

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ccmret
ccmret
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Group: General Forum Members
Points: 139 Visits: 94
I have three fields I am interested in:

Employee_ID,
Employee_Title,
Employee_Entry

I want to be able to select these three fields but only the record with the most recent Employee_Entry date. In some cases an Employee may have moved job titles and have several entries against the Employee_ID.

I have started with something like this:

SELECT DISTINCT
Employee_ID,
Employee_Title,
Employee_Entry

FROM emp.employees

I have tried using Max(Employee_Entry) but this returns all records for those who have multiple titles. I just want the current most recent Employee_title.
Lowell
Lowell
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Group: General Forum Members
Points: 74385 Visits: 40977
i think using the row number with a sub select will get you what you are after:

SELECT
Employee_ID,
Employee_Title,
Employee_Entry
FROM (SELECT
ROW_NUMBER() OVER (partition BY Employee_ID ORDER BY Employee_Entry DESC) AS RW,
Employee_ID,
Employee_Title,
Employee_Entry
FROM emp.employees) myAlias
WHERE RW = 1




Lowell
--help us help you! If you post a question, make sure you include a CREATE TABLE... statement and INSERT INTO... statement into that table to give the volunteers here representative data. with your description of the problem, we can provide a tested, verifiable solution to your question! asking the question the right way gets you a tested answer the fastest way possible!
ccmret
ccmret
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Group: General Forum Members
Points: 139 Visits: 94
That did it.

Thank you.
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