The use of Microsoft Excel automatically becomes a powerful tool to dive deep into the sea of data and form perceptions while generating interesting data models. Recently while in the middle of such an exciting activity came a moment where we were stuck with a not-so-latest version of Excel, and thus we are missing the oh-so-lovely built-in Count Distinct formula for a Pivot Table. Yes it's a deal-breaker, when we cannot avoid a pivot, and also desperately don't want to create a different standalone table or formula for a calculation to count the number of distinct values for a combination.
Say, we need to find for each Attrib_1 values (Column B) how many distinct IDs (column A) exist. Thus we can see AX and BY are repeated in rows 5 and 9, and so we need to tag their duplicate occurrences with a 0.
In the first approach, column E, we check if the row number of each row equals the first occurrence of the unique combination (Column D) we are looking for:
In the second approach, column F, we check if the counted value for the unique combination (Column D) we are looking for exceeds 1, in which case it's a duplicate and tagged 0. The range of this formula increases like $D$2:D3 $D$2:D4 $D$2:D5 as it goes down and thus the countif function can calculate from the top down. This needs tad more effort to type and create than the former.
Now if we select values from the purple buttons above we can see how vibrantly the pivot chart tells us that the count of distinct combinations for X is 3 (i.e. AX, BX, CX), Y is 2 (i.e. BY, AY), and Z is 1 (i.e. CZ). Once the data is ready, we can use ODI or any integration tool to further process this intelligent dataset.
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