Returns the time at which the first data point occurs for the data variable datavar. If there is no data for datavar or it is not actually a data variable then :NA: is returned.
NOTE GET DATA FIRST TIME is relatively slow and is best used inside of INITIAL equations.
Units: GET DATA FIRST TIME(units) --> time units
first sales data time = INITIAL(GET DATA FIRST TIME(sales data))
Availability: Not PLE or PLE Plus.