How to check if a column is blank or not?

Create a variable, say check_blank_col to check if ‘Column_A’ (in the selected data) is blank with following formula:

Formula: Length(Unique(“Column_A”))

Further if the value of this formula is 0, then it is a blank column. For identifying this you can create an IfElse block over the formula for check_blank_col, wherein you take decision basis the column being blank or not.

Example:
IfElse( CompareValues(check_blank_col, 0, “g”), do_this, else_this)

In the above formula, where CompareValues function is used, you check if the value of check_blank_col is greater than 0 or not and likewise decide to take further steps using IfElse.