๐Ÿ’ SQL/Join

[ํ”„๋กœ๊ทธ๋ž˜๋จธ์Šค][SQL] ๋ณดํ˜ธ์†Œ์—์„œ ์ค‘์„ฑํ™”ํ•œ ๋™๋ฌผ

์„ ๋‹ฌ 2023. 6. 1. 23:17
๋ฐ˜์‘ํ˜•

https://school.programmers.co.kr/learn/courses/30/lessons/59045

 

ํ”„๋กœ๊ทธ๋ž˜๋จธ์Šค

์ฝ”๋“œ ์ค‘์‹ฌ์˜ ๊ฐœ๋ฐœ์ž ์ฑ„์šฉ. ์Šคํƒ ๊ธฐ๋ฐ˜์˜ ํฌ์ง€์…˜ ๋งค์นญ. ํ”„๋กœ๊ทธ๋ž˜๋จธ์Šค์˜ ๊ฐœ๋ฐœ์ž ๋งž์ถคํ˜• ํ”„๋กœํ•„์„ ๋“ฑ๋กํ•˜๊ณ , ๋‚˜์™€ ๊ธฐ์ˆ  ๊ถํ•ฉ์ด ์ž˜ ๋งž๋Š” ๊ธฐ์—…๋“ค์„ ๋งค์นญ ๋ฐ›์œผ์„ธ์š”.

programmers.co.kr

 

๋ณดํ˜ธ์†Œ์— ๋“ค์–ด์˜ฌ ๋‹น์‹œ์—๋Š” ์ค‘์„ฑํ™”๋˜์ง€ ์•Š์•˜์ง€๋งŒ, ๋ณดํ˜ธ์†Œ๋ฅผ ๋‚˜๊ฐˆ ๋‹น์‹œ์—๋Š” ์ค‘์„ฑํ™”๋œ

๋™๋ฌผ์˜ ์•„์ด๋””์™€ ์ƒ๋ฌผ ์ข…, ์ด๋ฆ„์„ ์กฐํšŒํ•˜๋Š”

์•„์ด๋”” ์ˆœ์œผ๋กœ ์กฐํšŒํ•˜๋Š” SQL ๋ฌธ์„ ์ž‘์„ฑํ•ด์ฃผ์„ธ์š”.

 

-- ์ฝ”๋“œ๋ฅผ ์ž…๋ ฅํ•˜์„ธ์š”
SELECT i.animal_id, i.animal_type, i.name
from animal_ins i join animal_outs o on i.animal_id = o.animal_id
where i.sex_upon_intake like "Intact%" and o.sex_upon_outcome not like "Intact%"
order by i.animal_id
๋ฐ˜์‘ํ˜•