My data is like so:

Stock Code
AAPL AB
AAPL AB
AAPL AB
AAPL AB
AAPL AB
GM T2
GM T3
GM T2
GM T4


I am trying to create a table that will give me the Unique Count Of Codes
Per Stock - here's an example based on the data above:


Stock UniqueCodeCount
AAPL 1
GM 3


Thank you in advance