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

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

SELECT

PROJECT

JOIN

PRODUCT

Parent-Child relationship between the tables that connect them

Many to many relationship between the tables that connect them.

Network model between the tables that connect them.

None of the above

Ellipse

Dashed ellipse

Rectangle

Triangle