INNER JOIN & OUTER_JOIN

๊ฐ„๋‹จํ•˜๊ฒŒ ์•Œ์•„๋ณด๊ธฐ!

INNER JOIN

  • Join์ด ๋˜๋Š” key๊ฐ’์„ ๊ธฐ์ค€์œผ๋กœ ๊ต์ง‘ํ•ฉ

  • Null์„ ํฌํ•จํ•˜์ง€ ์•Š๋Š”๋‹ค

OUTER JOIN

  • Join์ด ๋˜๋Š” key ๊ฐ’์„ ๊ธฐ์ค€์œผ๋กœ ๊ธฐ์ค€ table์˜ key ์ง‘ํ•ฉ

  • ๊ธฐ์ค€์ด ๋˜๋Š” table์€ Null ๊ฐ’์„ ํฌํ•จํ•œ๋‹ค

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