Question

I have a problem in fetching data from mysql database tables.
I have two tables like table-1 and table-2 in below figure. How to get data from table-2 when pilotid is not equal to 1 in table-1.

Answer 1

I’m not sure, if I understand correctly, but this returns all rows of table-1, that do not have a matching entry in table-2. You can find the respective documentation of NOT EXISTS here.

SELECT * 
  FROM table-1 t1
  WHERE NOT EXISTS( SELECT * FROM table-2 t2 WHERE t1.`Venueid` = t2.`Venueid` )