Predicate calculus
Relational calculus
Relational algebra
None of the above
Base table
Index
View
The same as 0 for integer
The same as blank for character
The same as 0 for integer and blank for character
Not a value
Network Model
Object oriented model
E-R Model
None of these
The name of all fields in all files.
The width of all fields in all files.
The data type of all fields in all file
All of the above