In Crow's Foot and most other notations,entity types are denoted by a triangle.
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Q11: In an ERD diagram,primary and foreign keys
Q12: Identification dependency is a type of existence
Q13: A relationship that connects two entity types
Q14: In certain cases,adding an additional attribute to
Q15: In a multiple level generalization hierarchy,the attributes
Q17: Named relationships are found in both relational
Q18: In an ERD that conforms to the
Q19: If an attribute is associated with only
Q20: Adherence to the completeness and consistency rules
Q21: 
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