S
Soe
here is the data
a 1
b 2
c 1
a 3
a 2
c 3
a 1
like to count no of rows which has a and 1, in this case will be 2.
any advice?
a 1
b 2
c 1
a 3
a 2
c 3
a 1
like to count no of rows which has a and 1, in this case will be 2.
any advice?