데이터베이스 간 관계
데이터베이스 간 관계 👉👈 1. One-to-many 📗 우선 위키피디아(Wikipedia) 정의를 보자. In systems analysis, a one-to-many relationship is a type of cardinality that refers to the relationship between two entities (see also entity–relationship model) A and B in which an element of A may be linked to many elements of B, but a member of B is linked to only one element of A. For instance, think of A as books, and B as pages. A book can have many pages, but a page can only be in one book. (쿠니번역🤖 ) 시스템 분석에서 는 다음과 같은 두 개체간 관계를 …