SELECT date_test_taken FROM Student_Tests_Taken WHERE test_result  =  "Pass"
Which tests have "Pass" results? Return the dates when the tests were taken.
SELECT date_test_taken FROM Student_Tests_Taken WHERE test_result = `` Pass ''
select date_test_taken from student_tests_taken where test_result = value
Which tests have `` Pass '' results ? Return the dates when the tests were taken .