Question: 1-Explain the following terms and give examples I. Weak Entity II. Unary III. Binary IV. Teruary V. Domain VI. Entiry set or type VII. Entity

1-Explain the following terms and give examples

I. Weak Entity

II. Unary

III. Binary

IV. Teruary

V. Domain

VI. Entiry set or type

VII. Entity

2- Differentiate between natural join, Uion Join and Outer Join.

3-What are subqueries? What are the types of subqueries?

4- Explain Query Optimization

5-List and explain the techniques of optimizing queries

6- Explain the steps in query flow .

7-What is database connectivity?

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I Weak Entity A weak entity is an entity in a database that does not have a primary key attribute on its own It depends on a related entity known as a strong entity to provide it with a primary key We... View full answer

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