AirlineFlightSchedules : ident and actual_ident not matching

Hello Dogrock

Thank you for sharing link with information. Still, I need your more input here, please.

Previously, We had a question about calculating delay of flight. Here is the link of it, in which we did discussion:

After reading your answer, we found that we selected wrong flight. So, Delay information was wrong. So, we try to search those flight whose actual indent is either BLANK OR same as indent. and, Above issues arise.

Now, How can Cablr-system know that Flight has codeshare flight?