Question

If I have data like this:

Key	Name
1	Dan
2	Tom
3	Jon
4	Tom
5	Sam
6	Dan

What is the SQL query to bring back the records where Name is repeated 2 or more times?

So the result I would want is

Tom
Dan

Answer 1

Couldn’t be simpler…

Select Name, Count(Name) As Count      From Table     Group By Name     Having Count(Name) > 1     Order By Count(Name) Desc 

This could also be extended to delete duplicates:

Delete From Table Where Key In (     Select Max(Key)         From Table         Group By Name         Having Count(Name) > 1     )