query: SELECT email FROM employees WHERE commission_pct  =  "null" AND salary BETWEEN 7000 AND 12000 AND department_id = 50
question: are displaying the emails of the employees who have no commission percentage and salary within the range 7000 to 12000 and are working in that there department which number is 50.
query_toks: SELECT email FROM employees WHERE commission_pct = `` null '' AND salary BETWEEN 7000 AND 12000 AND department_id = 50
query_toks_no_value: select email from employees where commission_pct = value and salary between value and value and department_id = value
question_toks: are displaying the emails of the employees who have no commission percentage and salary within the range 7000 to 12000 and are working in that there department which number is 50.