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https://school.programmers.co.kr/learn/courses/30/lessons/59036

 

ํ”„๋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

 

 

 

๋ฌธ์ œ ์„ค๋ช…

ANIMAL_INS ํ…Œ์ด๋ธ”์€ ๋™๋ฌผ ๋ณดํ˜ธ์†Œ์— ๋“ค์–ด์˜จ ๋™๋ฌผ์˜ ์ •๋ณด๋ฅผ ๋‹ด์€ ํ…Œ์ด๋ธ”์ž…๋‹ˆ๋‹ค. ANIMAL_INS ํ…Œ์ด๋ธ” ๊ตฌ์กฐ๋Š” ๋‹ค์Œ๊ณผ ๊ฐ™์œผ๋ฉฐ, ANIMAL_ID, ANIMAL_TYPE, DATETIME, INTAKE_CONDITION, NAME, SEX_UPON_INTAKE๋Š” ๊ฐ๊ฐ ๋™๋ฌผ์˜ ์•„์ด๋””, ์ƒ๋ฌผ ์ข…, ๋ณดํ˜ธ ์‹œ์ž‘์ผ, ๋ณดํ˜ธ ์‹œ์ž‘ ์‹œ ์ƒํƒœ, ์ด๋ฆ„, ์„ฑ๋ณ„ ๋ฐ ์ค‘์„ฑํ™” ์—ฌ๋ถ€๋ฅผ ๋‚˜ํƒ€๋ƒ…๋‹ˆ๋‹ค.

NAMETYPENULLABLE
ANIMAL_ID VARCHAR(N) FALSE
ANIMAL_TYPE VARCHAR(N) FALSE
DATETIME DATETIME FALSE
INTAKE_CONDITION VARCHAR(N) FALSE
NAME VARCHAR(N) TRUE
SEX_UPON_INTAKE VARCHAR(N) FALSE

๋™๋ฌผ ๋ณดํ˜ธ์†Œ์— ๋“ค์–ด์˜จ ๋™๋ฌผ ์ค‘ ์•„ํ”ˆ ๋™๋ฌผ1์˜ ์•„์ด๋””์™€ ์ด๋ฆ„์„ ์กฐํšŒํ•˜๋Š” SQL ๋ฌธ์„ ์ž‘์„ฑํ•ด์ฃผ์„ธ์š”. ์ด๋•Œ ๊ฒฐ๊ณผ๋Š” ์•„์ด๋”” ์ˆœ์œผ๋กœ ์กฐํšŒํ•ด์ฃผ์„ธ์š”.

์˜ˆ์‹œ

์˜ˆ๋ฅผ ๋“ค์–ด ANIMAL_INS ํ…Œ์ด๋ธ”์ด ๋‹ค์Œ๊ณผ ๊ฐ™๋‹ค๋ฉด

ANIMAL_IDANIMAL_TYPEDATETIMEINTAKE_CONDITIONNAMESEX_UPON_INTAKE
A365172 Dog 2014-08-26 12:53:00 Normal Diablo Neutered Male
A367012 Dog 2015-09-16 09:06:00 Sick Miller Neutered Male
A365302 Dog 2017-01-08 16:34:00 Aged Minnie Spayed Female
A381217 Dog 2017-07-08 09:41:00 Sick Cherokee Neutered Male

์ด ์ค‘ ์•„ํ”ˆ ๋™๋ฌผ์€ Miller์™€ Cherokee์ž…๋‹ˆ๋‹ค. ๋”ฐ๋ผ์„œ SQL๋ฌธ์„ ์‹คํ–‰ํ•˜๋ฉด ๋‹ค์Œ๊ณผ ๊ฐ™์ด ๋‚˜์™€์•ผ ํ•ฉ๋‹ˆ๋‹ค.

ANIMAL_IDNAME
A367012 Miller
A381217 Cherokee

 

 

 


-- ์ฝ”๋“œ๋ฅผ ์ž…๋ ฅํ•˜์„ธ์š”
SELECT ANIMAL_ID, NAME
FROM ANIMAL_INS
WHERE INTAKE_CONDITION = 'Sick'

 

 

 


 

์š”์ฆ˜ ์ž๋ฐ”์Šคํฌ๋ฆฝํŠธ ์•Œ๊ณ ๋ฆฌ์ฆ˜ ๋ฌธ์ œ๋ฅผ ์ฐพ๊ณ  ๋ฐฐ์šฐ๋ฉด์„œ (๊ตฌ๊ธ€ ๊ฒ€์ƒ‰ํ•˜๋Š”๊ฒŒ ๋” ๋งŽ์Œใ…œใ…œ์–ธ์ œ์ฏค ๋‚ด ์ƒ๊ฐ๋Œ€๋กœ ๋ฐ”๋กœ ์•Œ๊ณ ๋ฆฌ์ฆ˜ ํ’€์–ด๋ณผ๊นŒ)

์ „๊ณต์‹œ๊ฐ„์— ๋ฐฐ์šด sql ๊ธฐ๋ณธ ๋ฒ ์ด์ง ๋ฌธ์ œ๋„ ์ฐพ์•„ ํ’€์–ด๋ดค๋‹ค 

์˜›๋‚ ์˜›์  ๊ธฐ์–ต์„ ๊บผ๋‚ด ์“ฐ๋Š๋ผ ๋”๋“ฌ๋”๋“ฌ์ด๊ธด ํ•˜์ง€๋งŒ ๊ตฌ๊ธ€๊ฒ€์ƒ‰๋„ ํ•˜๋ฉด์„œ ์žฌ๋ฐŒ๊ฒŒ ํ’€์—ˆ๋‹ค 

ํ•™์ƒ ๋•Œ sql ์ˆ˜์—…์„ ์ข‹์•„ํ–ˆ๋˜ ๊ธฐ์–ต๋„ ์žˆ๊ถ. ๋ชจ์ฒ˜๋Ÿผ ์Šคํฌ๋ฆฝํŠธ ๋ง๊ณ  ๋‹ค๋ฅธ ๊ณต๋ถ€๋„ ํ•ด๋ณด๋‹ˆ๊นŒ ์ƒ‰๋‹ค๋ฅธ ์žฌ๋ฏธ์˜€์Œ

 

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