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[6-1] `select_type`에 `DEPENDENT`가 나오게 되는 외부 요인에는 무엇이 있을까? #12

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JungleKim opened this issue May 5, 2018 · 0 comments

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JungleKim commented May 5, 2018

서브쿼리를 사용할때 외부 요인에 의해 절대로 Outer Query보다 먼저 실행 할 수 없는 경우가 생기는데,
여기서 말하는 외부 요인의 종류에는 무엇이 있을까.

책에 언급된것은 서브쿼리에 Outer Query의 값을 사용하는 경우가 있다.

JungleKim added the 코멘트 label

JungleKim assigned demarlik01

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