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#1
February 4th, 2010, 09:43 AM
posted to microsoft.public.access.gettingstarted
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Duplicate showing in query when there shouldn't be
Hi,
So new to this I could pull my hair out. So go easy on me. Thank you for any help you can offer. I have 1 query that is pulling from 3 tables. In those tables there aren't any duplicate entry's yet in the query i get duplicates for some entries. I can find no correlation as to why it could be choosing these as duplicates. Any direction? -- Thank you, Jennifer 
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#2
February 4th, 2010, 01:46 PM
posted to microsoft.public.access.gettingstarted
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Duplicate showing in query when there shouldn't be
As a guess there are multiple records in one table that match up to records in
another table. Simple example TableOne has only two records with Values in fieldOne of 1 and 2 TableTwo has four records with values in field2 of 1,1,1 and 2 If you run a query with TableOne joined to TableTwo on FieldOne To Field2, you will get four records returned 3 records for TableOne.FieldOne where the value of field one = 1 1 record for TableOne.FieldOne where the value of FieldOne =2 John Spencer Access MVP 2002-2005, 2007-2010 The Hilltop Institute University of Maryland Baltimore County Jennifer wrote: Hi, So new to this I could pull my hair out. So go easy on me. Thank you for any help you can offer. I have 1 query that is pulling from 3 tables. In those tables there aren't any duplicate entry's yet in the query i get duplicates for some entries. I can find no correlation as to why it could be choosing these as duplicates. Any direction?
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#3
February 4th, 2010, 05:01 PM
posted to microsoft.public.access.gettingstarted
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Duplicate showing in query when there shouldn't be
You have what is known as a Cartesian effect. This happens when your tables
are not properly joined. The quanity of records in one is multipled by the number of records in the other. Post the SQL of your query for suggestions on how to fix. -- Build a little, test a little. "Jennifer" wrote: Hi, So new to this I could pull my hair out. So go easy on me. Thank you for any help you can offer. I have 1 query that is pulling from 3 tables. In those tables there aren't any duplicate entry's yet in the query i get duplicates for some entries. I can find no correlation as to why it could be choosing these as duplicates. Any direction? -- Thank you, Jennifer
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#4
February 5th, 2010, 08:52 AM
posted to microsoft.public.access.gettingstarted
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Duplicate showing in query when there shouldn't be
So I am sorry to say I don't have a clue how to find the SQL of my query. I
can look at my query in design view but how to look in SQL? I am so used to Excel all the Access language has me pulling my hair out. -- Thank you, Jennifer "KARL DEWEY" wrote: You have what is known as a Cartesian effect. This happens when your tables are not properly joined. The quanity of records in one is multipled by the number of records in the other. Post the SQL of your query for suggestions on how to fix. -- Build a little, test a little. "Jennifer" wrote: Hi, So new to this I could pull my hair out. So go easy on me. Thank you for any help you can offer. I have 1 query that is pulling from 3 tables. In those tables there aren't any duplicate entry's yet in the query i get duplicates for some entries. I can find no correlation as to why it could be choosing these as duplicates. Any direction? -- Thank you, Jennifer
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