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How to Use DISTINCT on one column

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This article is from the book "Access 2007 Pure SQL

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Use DISTINCT on one column

Finding unique job titles

Discussion:

Suppose your next business goal is to retrieve the unique job titles of people who manage your orders from various corporate suppliers.  It is a good thing to know if you deal with managers, directors, or other positions.  Maybe you can get better discounts if you talk to higher positions with more decision-making flexibility.  You can easily achieve this goal using the DISTINCT keyword.  The unique corporate titles of people with whom you do business are seven in this example. 

Code:

SELECT DISTINCT ContactTitle

FROM suppliers
 

Result: