Consider the following DBDL description of an entity: Teachers (teach_num: variable length character string length 10 NO
Posted: Sat Jul 23, 2022 7:29 pm
Consider the following DBDL description of an entity: Teachers (teach_num: variable length character string length 10 NOT NULL teach_name: variable length character string length 10 NOT NULL) Primary Key: teach_num which integrity constraint is satisfied?
A. Entity integrity
B. Necessary data
C. Referential integrity
D. Referential foreign integrity
A. Entity integrity
B. Necessary data
C. Referential integrity
D. Referential foreign integrity