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A data base for e-Commerce games web site

The entities for supertype

• Products

The entities that are subtype

• Games

• Consoles

• Accessories

The attributes which are inherited from supertypes

In this data base all the subtypes will inherit the following attributes from the supertype

• Product _id

• Product_Description

• Product_name

• Product_price

The attributes that are unique in every subtype

In subtype Games

• Games_name

• Memory_required

• Number_of_players

• Other_game_details

Consoles subtype

• Drive_type

• Size

• Other_console_details

Accessories subtype

• Accessory_name

• Accessory_description

• Other_accessory_details