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0. 목표 - MySQL 로 달력 만들기 1. 실습 -- 2000-01-01 부터 + 9999 일까지 달력 만들기 WITH Calendar AS ( SELECT CONCAT(y, '0101') + INTERVAL tt*1000 + a*100 + b*10 + c DAY AS dt FROM (SELECT 0 AS tt UNION ALL SELECT 1 UNION ALL SELECT 2 UNION ALL SELECT 3 UNION ALL SELECT 4 UNION ALL SELECT 5 UNION ALL SELECT 6 UNION ALL SELECT 7 UNION ALL SELECT 8 UNION ALL SELECT 9 ) AS tt , (SELECT 0 AS a UNION ALL SELECT 1 UNION ..