I am inserting this into my SQL command and it is making my formula redundant since there are 6 null rows. How do I do this so it will only use one the min date_hired field where there is a null date_released field?
lecturer.date_hired < (select min(attendance.regstrn_made_date) from...
I need a query that will select only those student IDs with an average amount_paid less than 650. So far I have this written out and it works for returning the data with the criteria given. What would I add to only select where the student_id is less than 650? I have been working on this for...
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