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My Tech Blog (์ž๋™์ฐจ)

๐Ÿ“‘ 1. ํŠน์ • ์˜ต์…˜์ด ํฌํ•จ๋œ ์ž๋™์ฐจ ๋ฆฌ์ŠคํŠธ ๊ตฌํ•˜๊ธฐ ๋ฌธ์ œCAR_RENTAL_COMPANY_CAR ํ…Œ์ด๋ธ”์—์„œ '๋„ค๋น„๊ฒŒ์ด์…˜' ์˜ต์…˜์ด ํฌํ•จ๋œ ์ž๋™์ฐจ ๋ฆฌ์ŠคํŠธ๋ฅผ ์ถœ๋ ฅํ•˜๋Š” SQL๋ฌธ์„ ์ž‘์„ฑํ•ด์ฃผ์„ธ์š”. ๊ฒฐ๊ณผ๋Š” ์ž๋™์ฐจ ID๋ฅผ ๊ธฐ์ค€์œผ๋กœ ๋‚ด๋ฆผ์ฐจ์ˆœ ์ •๋ ฌํ•ด์ฃผ์„ธ์š”. โญ ์ •๋‹ต์ฝ”๋“œSELECT * FROM CAR_RENTAL_COMPANY_CARWHERE OPTIONS LIKE '%๋„ค๋น„๊ฒŒ์ด์…˜%'ORDER BY CAR_ID DESC;๐Ÿ“‘ 2. ์ž๋™์ฐจ ๋Œ€์—ฌ ๊ธฐ๋ก์—์„œ ์žฅ๊ธฐ/๋‹จ๊ธฐ ๋Œ€์—ฌ ๊ตฌ๋ถ„ํ•˜๊ธฐ ๐Ÿ“Œ ํ‹€๋ฆฐ์ฝ”๋“œSELECT HISTORY_ID, CAR_ID, DATE_FORMAT(START_DATE, '%Y-%m-%d'), DATE_FORMAT(END_DATE, '%Y-%m-%d'), CASE WHEN DATEDIFF(END_DATE..
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