FUNDAMENTALS OF COMPUTER

DATABASE FUNDAMENTALS

DATA WAREHOUSING AND DATA MINING

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Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]

Which of the following statements does not apply to relational databases?

A	Relational databases are simple to understand
B	Tables are one of the basic components of relational databases
C	Relational databases have a strong procedural orientation
D	Relational databases have a strong mathematical foundation

Explanation:

Detailed explanation-1: –Relational databases have a strong procedural orientation.-Relational databases relate tables to each other using common fields called keys.-Tables are one of the basic components of relational databases. Relational databases are simple to understand.

Detailed explanation-2: -Detailed Solution. Option 1) A database relation can have more than one primary key, is a false statement.

Detailed explanation-3: -NoSQL or non-relational databases examples: MongoDB, Apache Cassandra, Redis, Couchbase and Apache HBase. They are best for Rapid Application Development. NoSQL is the best selection for flexible data storage with little to no structure limitations.

Detailed explanation-4: -Features of a relational database. Relational databases need ACID characteristics. ACID refers to four essential properties: Atomicity, Consistency, Isolation, and Durability. These features are the key difference between a relational database and a non-relational database.

There is 1 question to complete.