I have got a problem where I need to work out how many deliveries were made
in a month of sales. I am doing this by if the postcode and the date of
delivery are the same on two separate orders they have gone together on one
van and it is counted as one delivery.


Example

POSTCODE DATE POSTCODE ORDERS DELIVERYS
A 1 A 2 1
A 1 B 2 2
B 1 C 4 2
B 2
C 3
C 1
C 3
C 3

I want to get the second table from the first table, I have tried using
pivot tables but not got very far. Can anyone help?

Cheers