๐Ÿ–ฅ๏ธ ์ฝ”๋”ฉํ…Œ์ŠคํŠธ/SQL

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

rtw0202 2025. 10. 28. 11:43

1. ๋ฌธ์ œ ์„ค๋ช…

๋‹ค์Œ์€ ์–ด๋А ํ•œ ์„œ์ ์—์„œ ํŒ๋งค์ค‘์ธ ๋„์„œ๋“ค์˜ ๋„์„œ ์ •๋ณด BOOK ํ…Œ์ด๋ธ”์ž…๋‹ˆ๋‹ค. BOOK ํ…Œ์ด๋ธ”์€ ๊ฐ ๋„์„œ์˜ ์ •๋ณด๋ฅผ ๋‹ด์€ ํ…Œ์ด๋ธ”๋กœ ์•„๋ž˜์™€ ๊ฐ™์€ ๊ตฌ์กฐ๋กœ ๋˜์–ด์žˆ์Šต๋‹ˆ๋‹ค.

ํ…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”.

 

2. ์ถœ๋ ฅ ์˜ˆ์‹œ

 

3. ๋ฌธ์ œ ๋‹ต์•ˆ

SELECT book_id, LEFT(published_date, 10) as published_date
FROM book
WHERE category = '์ธ๋ฌธ' and published_date LIKE '2021%'
ORDER BY published_date