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.

17 and 119

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.

A trampoline is a sheet or web supported by springs in a metal frame and is used as spring board.

Most of the known extrasolar planets resembles the planet Jupiter in the solar system.