I need to pull out the records whose First name,lastname and date of birth are of same.
Please find the below example.

```
Employeeid   firstname lastname DOB
00010         ravi      sagi     22/01/1990
00035         ravi      sagi     22/01/1990
00060         vasanth   guptha   20/01/1987
00115         vasanth   guptha   20/01/1987

```

Can you please help in writing the query.