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My Tech Blog (๋ฌผ๊ณ ๊ธฐ)

๋„ˆ๋ฌด ์‰ฌ์›Œ์„œ ๊ตณ์ด ๋ธ”๋กœ๊ทธ์— ์•ˆ ์˜ฌ๋ฆฌ๋ ค๋‹ค๊ฐ€ ์ฝ”๋“œ๋งŒ ์˜ฌ๋ฆฝ๋‹ˆ๋‹ค.ํ”„๋กœ๊ทธ๋ž˜๋จธ์Šค > ์ฝ”๋”ฉํ…Œ์ŠคํŠธ ์—ฐ์Šต > SLQ > `SUM, MAX, MIN`์นดํ…Œ๊ณ ๋ฆฌ์— ์žˆ๋Š” ๋ฌธ์ œ๋“ค์ž…๋‹ˆ๋‹ค. ๊ทธ๋ƒฅ ํ•œ ๋ˆˆ์— ๋ณด๊ณ  ๋ฐ”๋กœ ํ’€ ์ˆ˜ ์žˆ๋Š” 5์ดˆ์ปท ๋ฌธ์ œ๋“ค์€ํ•œ ํฌ์ŠคํŒ… ๋‚ด์— ์—ฌ๋Ÿฌ ๊ฐœ ๋ฌถ์–ด์„œ ์˜ฌ๋ฆฌ๋Š” ๊ฒƒ์ด๋‹ˆ ๊ตฌ์ฒด์ ์ธ ์„ค๋ช…์ด ํ•„์š”ํ•˜์‹œ๊ฑฐ๋‚˜ ๊ถ๊ธˆํ•œ ์ ์€ ๋Œ“๊ธ€๋กœ ๋ถ€ํƒ๋“œ๋ฆฝ๋‹ˆ๋‹ค.ํ™•์ธํ•˜๋Š” ๋Œ€๋กœ ๋‹ต ๋“œ๋ฆฝ๋‹ˆ๋‹ค. 1. ๊ฐ€์žฅ ๋น„์‹ผ ์ƒํ’ˆ ๊ตฌํ•˜๊ธฐ MAX()SELECT MAX(PRICE) AS MAX_PRICEFROM PRODUCT ํ’€์–ด์„œ ์“ฐ๋Š” ์ฝ”๋“œSELECT PRICE AS MAX_PRICEFROM PRODUCTORDER BY PRICE DESCLIMIT 1;2. ์ตœ๋Œ“๊ฐ’ ๊ตฌํ•˜๊ธฐ SELECT MAX(DATETIME)FROM ANIMAL_INS;3. ์žก์€ ๋ฌผ๊ณ ๊ธฐ ์ค‘ ๊ฐ€์žฅ ํฐ ๋ฌผ๊ณ ..
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