Database | MCQs

Explanation

A unique constraint is a rule that forbids duplicate values in one or more columns within a table. Unique and primary keys are the supported unique constraints.

Explanation

A field is also known as a column

that stores the same type of data and hence can be called a category of data.

Explanation

The third stage in designing a database is analyzing our tables more closely and creating a between tables.

Explanation

A super key is a set of one or more attributes (columns), which can uniquely identify a row in a table.

Explanation

Explanation

The QUERY can be used to select data from single and multiple tables.

Single Table Query:

When you want to retrieve data from a single table, you can use a simple SELECT statement.

Multiple Table Query:

To retrieve data from multiple tables, you use a JOIN clause. 

Explanation

Records are referred to in a database as: Rows

Explanation

In database management and information architecture, a data bank or databank is a repository of information about one or more subjects, that is, a database which is organized in a way that facilitates local or remote information retrieval and is able to process many continual queries over a long period of time.

Explanation

NADRA Headquarters is located in Islamabad.

NADRA stands for National Database and Registration Authority

NADRA Founded: March 10, 2000, Islamabad

The first CNIC started in 2000

NADRA Headquarters: Islamabad

NADRA Parent department: Ministry of Interior

The largest NADRA office is situated in Islamabad

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History

Pakistan initiated its National Identity Card System in 1973 under Article 30 of the Second Amendment.

The first NIC was that of Zulfiqar Ali Bhutto, the Prime Minister of the time

Explanation

In SQL, to retrieve data stored in our tables, we use the SELECT statement.