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1225.sql
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-- [ LeetCode ] 1225. Report Contiguous Dates
WITH FailTasks (period_state, start_date, end_date) AS (
SELECT
'failed' AS period_state,
MIN(fail_date) AS start_date,
MAX(fail_date) AS end_date
FROM (
SELECT
fail_date,
DATE_SUB(fail_date, INTERVAL ROW_NUMBER() OVER(ORDER BY fail_date ASC) DAY) AS grouping_option
FROM Failed
WHERE YEAR(fail_date) = 2019
) AS SubFailed
GROUP BY grouping_option
), SuccessTasks (period_state, start_date, end_date) AS (
SELECT
'succeeded' AS period_state,
MIN(success_date) AS start_date,
MAX(success_date) AS end_date
FROM (
SELECT
success_date,
DATE_SUB(success_date, INTERVAL ROW_NUMBER() OVER(ORDER BY success_date ASC) DAY) AS grouping_option
FROM Succeeded
WHERE YEAR(success_date) = 2019
) AS SubSucceded
GROUP BY grouping_option
)
SELECT
period_state,
start_date,
end_date
FROM FailTasks
UNION ALL
SELECT
period_state,
start_date,
end_date
FROM SuccessTasks
ORDER BY start_date ASC;