데이터 베이스정보처리기사(구) · 2007년03월04일 · 12/100
12.What is the degree of a relation?
1
the number of occurrences n of its relation schema
2
the number of tables n of its relation schema
3
the number of attributes n of its relation schema정답
4
the number of key n of its relation schema
해설
Degree(차수) : 속성(attribute)의 갯수 Cardinality(기수) : 튜플(record,tuple) 갯수