The latest articles on DEV Community by Suhngeun Yang (@suhngeun_yang). https://dev.to/suhngeun_yang https://media2.dev.to/dynamic/image/width=90,height=90,fit=cover,gravity=auto,format=auto/https:%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Fuser%2Fprofile_image%2F1636554%2F1eac8d30-0415-4f88-93a4-15c94ed886ca.png https://dev.to/suhngeun_yang en Suhngeun Yang Mon, 17 Jun 2024 01:26:40 +0000 https://dev.to/suhngeun_yang/data-structure-kan https://dev.to/suhngeun_yang/data-structure-kan <p>ctrl +/ or \</p> <p>모델링 : 논리적 모델링, </p> <p>row, tuple, record</p> <p>field, attribute, variable, feature</p> <p>단일값속성 &lt;-&gt; 다중값속성<br> 단순속성 &lt;-&gt; 복합속성</p> <p>key란 : 유일성과 최소성을 만족하는 릴레이션의 value를 찾을 때 사용하는 값?<br> key란 : tuple을 구분할 수 있는 attribute</p> <p>키의 종류 : super key, candidate key, primary key, alternate key, foreign key</p> <p>한 테이블의 중복되지 않은 로우의 개수 : cardinality </p> <p>매핑 카디널 : 1:1 1:n n:m</p> <p>degree</p> <p>unique, not null, check, default, primary</p> <p>regression<br> cause and result</p>