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[Programmers] ์ตœ์†Ÿ๊ฐ’ ๊ตฌํ•˜๊ธฐ (MIN)

by ๋šœ๋ถ€๋‹ˆ

 

 

์ฝ”๋”ฉํ…Œ์ŠคํŠธ ์—ฐ์Šต - ์ตœ์†Ÿ๊ฐ’ ๊ตฌํ•˜๊ธฐ

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””

programmers.co.kr

 

์ด ๋ฌธ์ œ๋Š” ๋™๋ฌผ ๋ณดํ˜ธ์†Œ์— ๊ฐ€์žฅ ๋จผ์ € ๋“ค์–ด์˜จ ๋™๋ฌผ์ด ์–ธ์ œ ๋“ค์–ด์™”๋Š”์ง€ ์กฐํšŒํ•˜๋Š” SQL๋ฌธ์„ ์ž‘์„ฑํ•˜๋Š” ๋ฌธ์ œ์ž…๋‹ˆ๋‹ค.

 

๋‚ ์งœ ์ •๋ณด์— MIN์„ ์‚ฌ์šฉํ•˜๋ฉด ์ถœ๋ ฅ ๊ฐ’์„ ์‰ฝ๊ฒŒ ๊ตฌํ•  ์ˆ˜ ์žˆ์Šต๋‹ˆ๋‹ค.

์ถœ๋ ฅ ๊ฐ’์˜ ์–‘์‹์„ ๋งž์ถ”๊ธฐ ์œ„ํ•ด AS๋ฅผ ์‚ฌ์šฉํ•˜์—ฌ ๋ณ„์นญ(ALIAS)์„ ์ง€์ •ํ•ด์ค๋‹ˆ๋‹ค.

 

SELECT MIN(DATETIME) AS ์‹œ๊ฐ„
FROM ANIMAL_INS
 

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