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Sql to find duplicates
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Forum:
Visual FoxPro
Category:
Coding, syntax & commands
Miscellaneous
Thread ID:
00811118
Message ID:
00811194
Views:
16
That's the ticket.. thanks so much.
Allen


>Allen,
>
>How about
>
>
>select * from lineitems ;
>where lineitems_id IN (select lineitems_id from lineitems ;
>                       group by 1 ;
>                       having count(lineitems_id) > 1) ;
>order by lineitems_id ;
>into cursor curDupes
>
>
>
>>>>>>Hi,
>>>>>>Can someone help me with the SQL to find all duplicates in a field?
>>>>>>Thanks,
>>>>>>Allen
>>>>>
select KeyFld, count(*) as CntDups from TestDups group by 1 ;
>>>>>     having CntDups > 1 ;
>>>>>     into cursor curDupes
>>>>>
>>>>
>>>>Sorry but I did get it...
>>>>Keyfld for me is lineitems_id
>>>>TestDups table is lineitems
>>>>What's CntDups... a variable?
>>>>
>>>>Allen

>>>
>>>
>>>CntDups becomes a calculated field in your query result (cursor).
>>>Basically you are saying to group by "lineitems_id" and count how many show up. Then disregard the ones that show up only once and show only 2 or more instances ("having CntDups > 1").
>>>
>>>
>>>select lineitems_id, count(*) as CntDups ;
>>>from lineitems ;
>>>group by 1 ;
>>>having CntDups > 1 ;
>>>into cursor curDupes
>>>
>>>
>>>Clearer?
>>
>>Thank you. It's clearer and works but I needed another thing...
>>What you gave me shows the duplicate record and the times it's duplicated, but I was trying to get the duplicate records, record by record. So that each record is listed.
>>Thanks,
>>Allen
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