What makes an entity weak?
A hostel records each room, and within each room the beds numbered 1, 2 and 3. Bed number 1 exists in every room; a bed means nothing on its own.
Bed is a weak entity. What identifies a particular bed?
A hostel records each room, and within each room the beds numbered 1, 2 and 3. Bed number 1 exists in every room; a bed means nothing on its own.
Bed is a weak entity. What identifies a particular bed?