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๐Ÿงต

์‚ฝ์งˆ๋ชฉ๋ก

group by ์— ์žˆ์œผ๋ฉด order by ์—๋„ ์žˆ์–ด์•ผ ํ•œ๋‹ค.
group by ๋กœ ํ•˜๋ฉด select projection ์ปฌ๋Ÿผ์ด ํ•˜๋‚˜์—ฌ์•ผ ํ•œ๋‹ค.