Using this function, the data before the specified substring will be returned. The result is returned as a text.
Example:
We have a field called "Company Name" with the value 'Rapidi A/S'
##BEFORE("Company Name", ' ');
Returns 'Rapidi'.
##BEFORE("Company Name", 'Rapidi');
Returns '0' (null) since no data exists before 'Rapidi'.
##BEFORE("Company Name", 'A/S');
Returns 'Rapidi ' (with a blank at the end).