Answer:
b. foreign key
Explanation:
In the database world, a foreign key is a field on one table and a primary key for another table. The purpose of a foreign key is to provide linkages between two or more tables. Given two tables A and B, and making A the point of reference, a primary key is a field that is unique in A while a foreign key is unique in B.
On another hand, a composite primary key is a combination of two or more fields/columns on database table that can be used to uniquely identify each row in the table.
In the database lingua, what we have is a unique key not a distinct key, though the two words are similar in meaning.
A duplicate key is used when an information may be repeatedly entered on a table.
So the correct option is a foreign key.
Answer:
Windows 10 if this is what I think u mean
Answer:
The answer is "4".
Explanation:
In this code, on line number 4, it will give the error message, and its correct solution can be defined as follows:
In this code, a variable "score" is declared, that holds a value that is 0, and in the next step, a method "onEvent" is declared that uses a method, and in the if block, it checks the "score" value that is less than 5 and it will print the message.
Answer:
The answer would be the middle
Explanation:
Hope this helps
