DATE_FORMAT 3

[ํ”„๋กœ๊ทธ๋ž˜๋จธ์Šค | SQL] ํ‰๋ถ€์™ธ๊ณผ ๋˜๋Š” ์ผ๋ฐ˜์™ธ๊ณผ ์˜์‚ฌ ๋ชฉ๋ก ์ถœ๋ ฅํ•˜๊ธฐ

์•Œ๊ณ ๋ฆฌ์ฆ˜ ๊ณ ๋“์  Kit > SELECT > ํ‰๋ถ€์™ธ๊ณผ ๋˜๋Š” ์ผ๋ฐ˜์™ธ๊ณผ ์˜์‚ฌ ๋ชฉ๋ก ์ถœ๋ ฅํ•˜๊ธฐ  ํ‰๋ถ€์™ธ๊ณผ ๋˜๋Š” ์ผ๋ฐ˜์™ธ๊ณผ ์˜์‚ฌ ๋ชฉ๋ก ์ถœ๋ ฅํ•˜๊ธฐ Lv.1DOCTOR ํ…Œ์ด๋ธ”์—์„œ ์ง„๋ฃŒ๊ณผ๊ฐ€ ํ‰๋ถ€์™ธ๊ณผ(CS)์ด๊ฑฐ๋‚˜ ์ผ๋ฐ˜์™ธ๊ณผ(GS)์ธ ์˜์‚ฌ์˜ ์ด๋ฆ„, ์˜์‚ฌID, ์ง„๋ฃŒ๊ณผ, ๊ณ ์šฉ์ผ์ž๋ฅผ ์กฐํšŒํ•˜๋Š” SQL๋ฌธ์„ ์ž‘์„ฑํ•ด์ฃผ์„ธ์š”. ์ด๋•Œ ๊ฒฐ๊ณผ๋Š” ๊ณ ์šฉ์ผ์ž๋ฅผ ๊ธฐ์ค€์œผ๋กœ ๋‚ด๋ฆผ์ฐจ์ˆœ ์ •๋ ฌํ•˜๊ณ , ๊ณ ์šฉ์ผ์ž๊ฐ€ ๊ฐ™๋‹ค๋ฉด ์ด๋ฆ„์„ ๊ธฐ์ค€์œผ๋กœ ์˜ค๋ฆ„์ฐจ์ˆœ ์ •๋ ฌํ•ด์ฃผ์„ธ์š”.   ์ฒซ ๋ฒˆ์งธ ํ’€์ด :     100์ -- ์ฝ”๋“œ๋ฅผ ์ž…๋ ฅํ•˜์„ธ์š” SELECT DR_NAME, DR_ID, MCDP_CD, DATE_FORMAT(HIRE_YMD, '%Y-%m-%d')FROM DOCTORWHERE MCDP_CD = 'CS' OR MCDP_CD = 'GS'ORDER BY HIRE_YMD DESC, DR_NA..

[ํ”„๋กœ๊ทธ๋ž˜๋จธ์Šค | SQL] ์กฐ๊ฑด์— ๋งž๋Š” ๋„์„œ ๋ฆฌ์ŠคํŠธ ์ถœ๋ ฅํ•˜๊ธฐ

์•Œ๊ณ ๋ฆฌ์ฆ˜ ๊ณ ๋“์  Kit > SELECT > ์กฐ๊ฑด์— ๋งž๋Š” ๋„์„œ ๋ฆฌ์ŠคํŠธ ์ถœ๋ ฅํ•˜๊ธฐ  ์กฐ๊ฑด์— ๋งž๋Š” ๋„์„œ ๋ฆฌ์ŠคํŠธ ์ถœ๋ ฅํ•˜๊ธฐ Lv.1BOOK ํ…Œ์ด๋ธ”์—์„œ 2021๋…„์— ์ถœํŒ๋œ '์ธ๋ฌธ' ์นดํ…Œ๊ณ ๋ฆฌ์— ์†ํ•˜๋Š” ๋„์„œ ๋ฆฌ์ŠคํŠธ๋ฅผ ์ฐพ์•„์„œ ๋„์„œ ID(BOOK_ID), ์ถœํŒ์ผ (PUBLISHED_DATE)์„ ์ถœ๋ ฅํ•˜๋Š” SQL๋ฌธ์„ ์ž‘์„ฑํ•ด์ฃผ์„ธ์š”.๊ฒฐ๊ณผ๋Š” ์ถœํŒ์ผ์„ ๊ธฐ์ค€์œผ๋กœ ์˜ค๋ฆ„์ฐจ์ˆœ ์ •๋ ฌํ•ด์ฃผ์„ธ์š”.   ์ฒซ ๋ฒˆ์งธ ํ’€์ด :     100์ -- ์ฝ”๋“œ๋ฅผ ์ž…๋ ฅํ•˜์„ธ์š”SELECT BOOK_ID, DATE_FORMAT(PUBLISHED_DATE, '%Y-%m-%d') AS PUBLISHED_DATEFROM BOOKWHERE CATEGORY = '์ธ๋ฌธ' AND YEAR(PUBLISHED_DATE) = '2021'ORDER BY PUBLISHED_DATE ASCdat..

[ํ”„๋กœ๊ทธ๋ž˜๋จธ์Šค | SQL] ์กฐ๊ฑด์— ๋งž๋Š” ๋„์„œ์™€ ์ €์ž ๋ฆฌ์ŠคํŠธ ์ถœ๋ ฅํ•˜๊ธฐ

์•Œ๊ณ ๋ฆฌ์ฆ˜ ๊ณ ๋“์  Kit > JOIN > ์กฐ๊ฑด์— ๋งž๋Š” ๋„์„œ์™€ ์ €์ž ๋ฆฌ์ŠคํŠธ ์ถœ๋ ฅํ•˜๊ธฐ ์กฐ๊ฑด์— ๋งž๋Š” ๋„์„œ์™€ ์ €์ž ๋ฆฌ์ŠคํŠธ ์ถœ๋ ฅํ•˜๊ธฐ Lv.2 '๊ฒฝ์ œ' ์นดํ…Œ๊ณ ๋ฆฌ์— ์†ํ•˜๋Š” ๋„์„œ๋“ค์˜ ๋„์„œ ID(BOOK_ID), ์ €์ž๋ช…(AUTHOR_NAME), ์ถœํŒ์ผ(PUBLISHED_DATE) ๋ฆฌ์ŠคํŠธ๋ฅผ ์ถœ๋ ฅํ•˜๋Š” SQL๋ฌธ์„ ์ž‘์„ฑํ•ด์ฃผ์„ธ์š”. ๊ฒฐ๊ณผ๋Š” ์ถœํŒ์ผ์„ ๊ธฐ์ค€์œผ๋กœ ์˜ค๋ฆ„์ฐจ์ˆœ ์ •๋ ฌํ•ด์ฃผ์„ธ์š”. ์ฒซ ๋ฒˆ์งธ ํ’€์ด : 100์  -- ์ฝ”๋“œ๋ฅผ ์ž…๋ ฅํ•˜์„ธ์š” SELECT B.BOOK_ID, A.AUTHOR_NAME, DATE_FORMAT(B.PUBLISHED_DATE, '%Y-%m-%d') AS PUBLISHED_DATE FROM BOOK B JOIN AUTHOR A ON B.AUTHOR_ID = A.AUTHOR_ID WHERE B.CATEGORY = '๊ฒฝ์ œ' ..