DBMS Task

1. A relational database consists of a collection of
3. The ________ clause is used to list the attributes desired in the result of a query.
5. A ________ in a table represents a relationship among a set of values.
8. In E-R Diagram relationship type is represented by ___________ symbol.
10. The primary key is selected from __________ set.
11. The_____ operation allows the combining of two relations by merging pairs of tuples, one from each relation, into a single tuple.
12. The union of Primary keys of the related entity sets becomes a ________ of the relation

2. Properties that describe the characteristics of entities are called
4. In an E-R diagram attributes are represented by___________ symbol.
6. In general,the select operation is denoted by
7. In the relational model, relationships between relations or tables are created by using ___________.
9. For each attribute of a relation, there is a set of permitted values, called the ________ of that attribute.