Multiple NOT distinct

Question

I\'ve got an MS access database and I would need to create an SQL query that allows me to select all the not distinct entries in one column while still keeping all the value

Answer 1

select 
  * 
from 
  my_table t1, 
  my_table t2
where 
  t1.B = t2.B
and
  t1.C != t2.C

-- apparently you need to use <> instead of != in Access
-- Thanks, Dave!

Something like that?