Questions

A primary key is a special relational database table column or combination of columns designated to uniquely identify all table records. That is, A primary key is a column or set of columns in a table that uniquely identifies tuples (rows) in that table.

A primary key, also called a Primary Keyword.

Main Features Primary key are ::

It must contain a unique value for each row of data.

It cannot contain null values.

A computer programming language is nothing but a language which is understand by the computer.

Examples of programming languages are Basic, C, Java, Python, ...

A daisy-wheel printer works on the same principle as a ball-head typewriter. Daisy wheel printer is a type of impact printer invented in 1969.

The daisy wheel is a disk made of plastic or metal on which characters stand out in relief along the outer edge. To print a character, the printer rotates the disk until the desired letter is facing the paper.

In India, the right to vote is provided by the Constitution and the Representation of People's Act, 1951, subject to certain disqualifications. Article 326 of the Constitution guarantees the right to vote to every citizen above the age of 18.

The Bill of Rights established the rights of citizens. It is also called as Declaration of rights or Charter of rights. It is a list of most important rights to the citizens of a country.

When you can't hear it is called as Deaf.