関連ワード:  what is entity dbms with example    what is entity set in dbms with example    what is entity type in dbms with example    what is weak entity in dbms with example    what is strong entity in dbms with example    what is entity and attribute in dbms with example    what is entity relationship model in dbms with example    what is weak entity set in dbms with example    what is an entity dbms    what is dbms give example