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2๏ธโƒฃ ๋‹ต ๋ณด๊ธฐ

์‚ฝ์ž… ์ด์ƒ (Insertion Anomaly) ์‚ญ์ œ ์ด์ƒ (Delete Anomaly) ๊ฐฑ์‹  ์ด์ƒ (Update Anomaly)
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