How to get only one record for each duplicate rows of the id in oracle?

Posted by Psychocryo on Stack Overflow See other posts from Stack Overflow or by Psychocryo
Published on 2013-11-12T03:17:58Z Indexed on 2013/11/12 3:54 UTC
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Filed under:

sql

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database

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Oracle

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select

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plsql

suppose i have this table:

group_id | image | image_id |
-----------------------------
23        blob       1
23        blob       2
23        blob       3
21        blob       4
21        blob       5
25        blob       6
25        blob       7

how to get results of only 1 of each group id? in this case,there may be multiple images for one group id, i just want one result of each group_id

i tried distinct but i will only get group_id. max for image also would not work.

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