RELATIONAL ALGEBRA and SET Operators: Match the SET Operator to the function the

Question

RELATIONAL ALGEBRA and SET Operators: Match the SET Operator to the function they perform.

Combines the results from two queries and eliminates duplicates

Combines the results from two queries

Combines the results from two queries and returns only the data in both queries.

Combines the results from two queries and returns only uniques rows returned by the first query and not by the second.

CARDINALITY: Match the number of occurrences to a database implementation

One -to- One

One -to- Many

Many -to- Many

Question 3

INTEGRITY: Match the type of integrity to how it is implemented.

Data Integrity

Data Integrity

Data Integrity

Entity Integrity

Referential Integrity

Question 4

Match the term used in Data Modeling to the term used in Database

Entity

Attribute

Instance

Unique Identifier

Question 5

Match the term used in Programming to the term used in Database

File

FIeld

Record

RELATIONAL ALGEBRA and SET Operators: Match the SET Operator to the function they perform.

Question 1

Combines the results from two queries and eliminates duplicates

Combines the results from two queries

Combines the results from two queries and returns only the data in both queries.

Combines the results from two queries and returns only uniques rows returned by the first query and not by the second.

CARDINALITY: Match the number of occurrences to a database implementation

Question 2

One -to- One

One -to- Many

Many -to- Many

Question 3

INTEGRITY: Match the type of integrity to how it is implemented.

Data Integrity

Data Integrity

Data Integrity

Entity Integrity

Referential Integrity

Question 4

Match the term used in Data Modeling to the term used in Database

Entity

Attribute

Instance

Unique Identifier

Question 5

Match the term used in Programming to the term used in Database

File

FIeld

Record

Explanation / Answer

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Match the SET Operator to the function they perform.

Question 1

Combines the results from two queries and eliminates duplicates - UNION produces the unique rows from two queries after removing the duplicates.

Combines the results from two queries - UNION ALL combines the results from 2 queries without removing the duplicates

Combines the results from two queries and returns only the data in both queries. - INTERSECT displays the common rows from the 2 queries.

Combines the results from two queries and returns only uniques rows returned by the first query and not by the second. - MINUS operator is the operator which displays the rows which are present in the first query but not present in the second query.

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