Returning duplicate records

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May 8th, 2009, 10:53 AM

adam678

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Query - General - Returning duplicate records

Hi,

I have a MySQL database where I store records for images in one table and photographers details in another. When an image is added to the images table it is linked to a photographer using the photographers ID. The images are also split up into different categories. What I want to do is compile a list of all photographers who have images in a specified category.

See below the SQL I have come up with.

Code:

SELECT p.ID, p.name FROM photographers p, images i WHERE p.ID = i.photographerID AND i.category = 5 ORDER BY p.ID ASC

The SQL above returns the photographers that have images within that category, which is what I want, but the problem is if the photographer 'Joe Bloggs' has 50 images within category 5, it will return his name 50 times, and I only need it to be returned once.

I understand why it's doing this, I just can't work out the correct SQL to return the photographers names only once.

Can anyone help?

May 9th, 2009, 03:37 AM

June7

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Use the DISTINCT condition in the SQL

Code:

SELECT DISTINCT p.ID, p.name FROM photographers p, images i WHERE p.ID = i.photographerID AND i.category = 5 ORDER BY p.ID ASC

May 12th, 2009, 02:44 AM

bklr

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or use row_number() function

October 21st, 2009, 03:27 AM

sakthi.tnj

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Re: Returning duplicate records

Hi, I hope the below query will be useful for you.

Quote:

SELECT distinct p.ID, p.name FROM photographers p, images i WHERE p.ID = i.photographerID AND i.category = 5 ORDER BY p.ID ASC

Thanks & Regards
Sakthimeenakshi.S

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