SELECT
*
FROM (SELECT
main.UNIQUE_ID,
main.DATE_OF_STOP,
main.CLOSEST_CITY,
TIME_OF_STOP,
twilight.CTWILIGHT_BEGIN as twilight_begin,
twilight.CTWILIGHT_END as twilight_end,
CASE WHEN TIME_OF_STOP > twilight.CTWILIGHT_BEGIN AND TIME_OF_STOP < twilight.CTWILIGHT_END THEN "Within civil twilight" ELSE "in the dark..." END as IN_TWILIGHT
FROM
aa_main_table as main
INNER JOIN
civil_twilight_hours as twilight
ON twilight.DATE_OF_STOP = main.DATE_OF_STOP
AND twilight.CLOSEST_CITY = main.CLOSEST_CITY
)
Civil Twilight draft
query