1. Jonathan Ashwell
  2. Valentina Database ADK
  3. Dienstag, Januar 19 2016, 08:37 PM
  4.  Abonnieren via E-Mail
I'm trying to find a simple way to identify any duplicates I have in a text field "uuid". (The field is not flagged as unique, I'm managing this myself). Is there a simple way to search for all records where the field "uuid" is not unique so I can find duplicates? Or must I loop through all the records and search for the uuid and see if there is more than one hit?

Jon
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Ivan Smahin Akzeptierte Antwort
select group_concat( recID ) from t1 group by "uuid"

to get the list of recID for each uuid value. If you get the single row, then your uuid us unique.
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Ruslan Zasukhin Akzeptierte Antwort
Note that ORDER BY, GROUP BY commands, will produce index file for that field anyway.
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Jonathan Ashwell Akzeptierte Antwort
Thank you. Is it possible to just get those records with more than one uuid? Something like this?

select uuid from t1 group by uuid having Count(*) > 1
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Ivan Smahin Akzeptierte Antwort
Sure, but you technically need to mention count(*) in select list:

select count(*) as c, group_concat( recID ) from t1 group by uuid having c > 1
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Jonathan Ashwell Akzeptierte Antwort
Thank you very much, Ivan.
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