Real null count in dates

Victoria_G1

Hello everyone,

I am trying to get an accurate count of the number of blank cells for a column inside an ETL prior to using a formula to estimate the date in the event that it is blank. I included a test output dataset inside the ETL to track the number of blank cells as well the estimation before/after creating a new column with the formula. Logically, the correct number of blank cells for which a date should be estimated (which is what the formula is doing) is 1746, but the ETL is making estimates for 155,021 rows, which is not correct as these rows do have a date. When I use the traditional IFNULL, the formula is counting those 155,021 rows. Would appreciate any help on what formula/methodology to use to correctly count/detect those 1746 blank rows.

Thanks!

nmizzell

Try sum(case when Date is null then 1 else 0 end)

GrantSmith

What is the formula you're using?

You could do something like:

CASE WHEN `field` IS NULL THEN 1 ELSE 0 END

Then aggregate your dataset and SUM that field to get a count of the records.

nmizzell

Try sum(case when Date is null then 1 else 0 end)

GrantSmith

What is the formula you're using?

You could do something like:

CASE WHEN `field` IS NULL THEN 1 ELSE 0 END

Then aggregate your dataset and SUM that field to get a count of the records.