Question

I am creating a procedure where I’m supposed to look for the last date of an exam.
So I created a local variable for this because I will need this date in other things as well. However, when I do a simple SELECT of this local variable, I get the message:

Unknown column ‘last_exam’ in ‘field list’.

Code:

DECLARE latest_exam date;

  SELECT DATE(MAX(ex_date))
    INTO latest_exam
    FROM vets
   WHERE an_id = p_animal_id
GROUP BY an_id;

SELECT latest_exam, and a bunch of other stuff. ;

In the select, do I need to include a FROM clause? I didn’t think so because I figured latest_exam is within the procedure.

Answer 1

you’re not assigning the result of your select in the variable.

Do this

select latest_exam = date(max(ex_date))..