Script to Prefix Max Value and Data

[jerfwork]

Hello all,

I would like to ask if below is possible? I would like to find out customer's favourite category by date for each customer in Script level but I'm unable to figure out. Below is my dataset.

CUSTOMER_NO	DATE_OF_PURCHASE	DIMENSION
CustomerA	30/04/2017	Bags
CustomerA	30/04/2017	Bags
CustomerA	30/04/2017	Shoes
CustomerA	30/04/2017	Accessories
CustomerA	29/04/2017	Shoes
CustomerA	29/04/2017	Shoes
CustomerA	29/04/2017	Bags
CustomerA	29/04/2017	Accessories
CustomerB	29/04/2017	Shoes
CustomerB	29/04/2017	Shoes
CustomerB	29/04/2017	Bags
CustomerB	29/04/2017	Accessories

Expected Result:

CUSTOMER_NO	DATE_OF_PURCHASE	DIMENSION
CustomerA	30/04/2017	Bags
CustomerA	29/04/2017	Shoes
CustomerB	29/04/2017	Shoes

Thank you in advance!

[jerfwork]

I managed to get the highest info now by using FirstSortedValue and COUNT, but if the dataset is showing as below. The result will be blank. Is that a possibility auto populate a random value from Category if it is blank?

CUSTOMER_NO	DATE_OF_PURCHASE	DIMENSION
CustomerB	28/04/2017	Bags
CustomerB	28/04/2017	Accessories

Expected Result:

CUSTOMER_NO	DATE_OF_PURCHASE	DIMENSION
CustomerB	28/04/2017	Bags