Having 1
GROUP BY, HAVING

โ“GROUP BY - ๋ฐ์ดํ„ฐ๋ฅผ ์›ํ•˜๋Š” ๊ทธ๋ฃน์œผ๋กœ ๋‚˜๋ˆŒ ์ˆ˜ ์žˆ์Œ GROUP BY (์—ด)  โ“HAVING - GROUP BY์™€ ํ•จ๊ป˜ ์“ฐ์ž„- GROUP ์ค‘ ์กฐ๊ฑด์— ๋งž๋Š” GROUP๋งŒ ๋‚จ๊น€ SELECT (์—ด) FROM (ํ…Œ์ด๋ธ” ๋ช…)GROUP BY (์—ด)HAVING (์กฐ๊ฑด)  โ“์ถ”๊ฐ€ 1) ๋‚ ์งœ์™€ ์‹œ๊ฐ„์ด ์“ฐ์—ฌ์žˆ๋Š” ๊ฐ’์—์„œ ์‹œ๊ฐ„๋งŒ ๋ฝ‘์•„์˜ค๊ณ  ์‹ถ์œผ๋ฉด hour(์—ด)์„ ์‹œํ–‰2) HAVING์ ˆ์—์„œ hour(์—ด)๊ณผ ๊ฐ™์ด ์‚ฌ์šฉํ•  ๊ฒฝ์šฐ ์—๋Ÿฌ๊ฐ€ ๋ฐœ์ƒํ•œ๋‹ค-> SELECT๋ฌธ์—์„œ as ๋ธ”๋ผ๋ธ”๋ผ์™€ ๊ฐ™์ด ๋ณ„์นญ์„ ์‚ฌ์šฉํ•ด์•ผ ํ•œ๋‹ค.
โ˜๏ธ์ •๋ฆฌ/โ„๏ธSQL 2022.01.17
1

ํ‹ฐ์Šคํ† ๋ฆฌํˆด๋ฐ”