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Problem regarding mysql query: it is displaying duplicate contents

  #1  
Dec 11th, 2007
I made a query that joins 3 tables. Products, parts, and sales invoice tables. The thing is, the common key between the 3 tables is the sales invoice number, but when I try to execute the the query it displays duplicates.

One example is when I make a query on a sales invoice, it displays four rows of results. each row contains a duplicate of the parts and products.

What could be the problem of my query?
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Re: Problem regarding mysql query: it is displaying duplicate contents

  #2  
Dec 11th, 2007
It would be easier for us if you give us the structure of the tables and also the query that you are using.
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Re: Problem regarding mysql query: it is displaying duplicate contents

  #3  
Dec 13th, 2007
You should use GROUP BY.
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