A trigger can be used as a security measure in which of the following ways?
Blog
The ________ states that no primary key attribute may be nul…
The ________ states that no primary key attribute may be null.
The following statement is an example of: CREATE TABLE Custo…
The following statement is an example of: CREATE TABLE Customer_t ( CustNmbr number(11,0), CreditLimit number(6,2), CustStart date, CustEnd date, PERIOD for Custperiod(CustStart,CustEnd));
The following figure shows an example of:
The following figure shows an example of:
The value a field will assume unless the user enters an expl…
The value a field will assume unless the user enters an explicit value for an instance of that field is called a:
The ________ rule states that an entity instance can simulta…
The ________ rule states that an entity instance can simultaneously be a member of two (or more) subtypes.
A transaction is considered isolated when:
A transaction is considered isolated when:
An integrity control supported by a DBMS is:
An integrity control supported by a DBMS is:
One major advantage of the outer join is that:
One major advantage of the outer join is that:
Requiring a CustomerID to exist in a Primary table before it…
Requiring a CustomerID to exist in a Primary table before it can exist in a foreign table is an example of: