A primary key is the column or columns that contain values that uniquely identify each row in a table. A database table must have a primary key for Optim to insert, update, restore, or delete data from a database table. Optim uses primary keys that are defined to the database.
Option D. Sr. No.
A primary key is a field or set of fields with values that are unique throughout a table. Values of the key can be used to refer to entire records, because each record has a different value for the key. Each table can only have one primary key.
A primary key is used to assure the value in the particular column is unique. The foreign key provides the link between the two tables.
To learn more about A primary key, refer
#SPJ2
Answer:
A superclass object is a subclass object.
Explanation:
By definition, in OOP (Object Oriented Programming), the inheritance concept defines two kind of classes:
A subclass, this is also known as the child class, which inherits from another class.
A superclass, this is also known as the parent class, which other classes inherit (or extends) from.
Answer: The Country that is the leader in solar powered technology would be China. Hope this helped! ^w^
b. False
I'm on Alpha omega academy and the correct answer would be false.
Answer:
Option 3 is the correct answer for the above question.
Explanation:
If any function is defined after the main function or any other function which is used to call that function then there needs a prototype defined before the calling function definition to tell the compiler that what type of that function is. for example, if a fun function is called by the main function and its definition is after the main function, then there needs to declare a function prototype before the main function definition.
The prototype syntax is "return_type function_name (argumen_type1, argument_type2)". This syntax is matched from option 3. Hence 3 is the correct answer for the above question while the other is not because:-
c. potential for voter fraud
b. there are too many elections
d. everyone doesn't own a computer
C) potential for voter fraud