What are the completion dates of all the tests that have result 'Fail'?
CREATE TABLE Student_Course_Enrolment (
    date_of_completion VARCHAR,
    registration_id VARCHAR
)

CREATE TABLE Student_Tests_Taken (
    registration_id VARCHAR,
    test_result VARCHAR
)
SELECT T1.date_of_completion FROM Student_Course_Enrolment AS T1 JOIN Student_Tests_Taken AS T2 ON T1.registration_id = T2.registration_id WHERE T2.test_result = "Fail"
Below are sql tables schemas paired with instruction that describes a task. Using valid SQLite, write a response that appropriately completes the request for the provided tables. ### Instruction: What are the completion dates of all the tests that have result 'Fail'? ### Input: CREATE TABLE Student_Course_Enrolment (
    date_of_completion VARCHAR,
    registration_id VARCHAR
)

CREATE TABLE Student_Tests_Taken (
    registration_id VARCHAR,
    test_result VARCHAR
) ### Response: SELECT T1.date_of_completion FROM Student_Course_Enrolment AS T1 JOIN Student_Tests_Taken AS T2 ON T1.registration_id = T2.registration_id WHERE T2.test_result = "Fail"