I have a database in which one column contains IP addresses.
Sometimes, an IP address appears more than once in the column.
I need a function that counts the amount of unique IP addresses in that column.
(ie.
With a data set of:
A1: 123.45.67.89
A2: 123.45.67.89
A3: 987.65.43.21
the function would return 2
)
Can anyone enlighten me?
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