db

1.데이터베이스, DBMS, SQL

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2.DB JOIN

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3.SubQuery, Data type

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4.데이터조작어(DML), Commit

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5.데이터제어어(DCL), 컬럼속성, 기본키와 외래키

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6.뷰(view), 시퀀스(Sequence), Index

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