troubleshooting Question

find duplicate column within a group

Avatar of DaveChoiceTech
DaveChoiceTech asked on
6 Comments1 Solution233 ViewsLast Modified:
The table below shows 12 records grouped by ID1, ID2 and ID3
The first and second group contain duplicate ID3's within the group.
How can I write a query to find these duplicates.

1   100 A
1   101 A
1   102 B
1   103 C

2      104      A
2      105 B
2      106 B
2   107 C

3      108 A
3   109 B
3   110 C
3   111 D
Mike Eghtebas
Database and Application Developer

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