DBI202Xuất hiện trong 1 đề thi
In SQL, a view is a virtual table based on the result-set of an SQL statement. Which statement is not correct about view?
Các lựa chọn
AThe UPDATE command is applicable to all views.
BThe fields in a view are fields from one or more real tables in the database.
CThe database engine recreates the view, every time a user queries it.
DA view always shows up-to-date data.