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SQL Database Management

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Questions and Answers

What is the correct SQL command to add data to a table?

CREATE

UPDATE

INSERT (correct)

ALTER

What is the normal form achieved when a primary key is defined?

1NF (correct)

2NF

Boyce-Codd Normal Form

3NF

What type of index uses a single root node to point to multiple data pages?

unique index

nonclustered index

clustered index (correct)

hashed index

What clause is used with the SELECT command to pull records based on a specific range of values?

<p>BETWEEN</p> Signup and view all the answers

What is the primary purpose of an index in a database?

<p>To improve query performance</p> Signup and view all the answers

Study Notes

Database Operations

To add data to a table, use the INSERT statement.
ADD is not a valid statement for adding data to a table.

Normalization Levels

Defining a primary key reaches the level of 1NF (First Normal Form).
Primary key definition does not necessarily imply reaching 2NF, 3NF, or 4NF.

Index Types

A clustered index uses pointers that point to row location.
A nonclustered index is a type of index that does not store data in a particular order.
There is no such type of index as quick index or primary index in relational databases.

SELECT Clause

The BETWEEN clause is used with the SELECT command to pull records based on a range.
There is no COMBO or COMBINE clause in SQL.

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Description

This quiz assesses your knowledge of SQL commands, indexing, and normalization. Test your understanding of database management concepts and SQL syntax.