A composite primary key<span> is a set of several primary </span>keys<span> that, together, uniquely identifies each record.</span>
Primary keys are used as identifiers of composite entities. In this case each primary key combination is allowed only once in the *:* relationship.
Other case where primary keys are used is as identifiers of weak entities, where the weak entity has a strong identifying relationship with the parent entity.
Answer:
by using keystroke codes
by using the character map
by using the Symbols command group
by using the Symbol drop-down arrow
Answer:ok be how hobrhkihfehgdhdj fuiufiisefif jfkijfjfhhfhfhfhf
Explanation:
Virus such as a Trojan or Worm, and can cause network crashes.
