JFE301Xuất hiện trong 1 đề thi
Which of the following appropriately describes a schema in a relational database management system?
Các lựa chọn
AIt is a set of data definitions such as the data properties, format, relationship with other data, etc.
BIt is not an actual table but a virtual table from the perspective of the user.
CIt is the general term for database operations such as data insertion, updating, deletion, search, etc.
DIt is the general term for various conditions and constraints that are used to maintain the database in absolutely perfect condition.