There are two tables. In one table, the columns are named after the month numbers. The rows are types of meetings: Designer, Estimator. In the second table Column A is the date of the deal. Column B is the type of meeting. How to calculate the number of designers in January in the first table? I tried
=arrayformula(COUNTIFS('All'!B:B;"Designer";MONTH('All'!A:A);1))
Also I tried it withount arrayformula but still doesn't work
You can try this:
=arrayformula(COUNTIFS('All'!B:B;"Designer";{MONTH('All'!A:A)};1))
I just added brackets around your month formula.