Questions

Foreign keys are the columns of a table that points to the primary key of another table. They act as a cross-reference between tables.

In detail : A Foreign key is a field (or collection of fields) in one table that uniquely identifies a row of another table or the same table. In simpler words, the foreign key is defined in a second table, but it refers to the primary key or a unique key in the first table.

In April 1500, Brazil was claimed by Portugal on the arrival of the Portuguese fleet commanded by Pedro Alvares Cabral.

A price floor is the minimum price that can be charged. A binding price floor occurs when the government sets a required price on goods at a price above equilibrium. Because the government requires that prices not drop below this price, that price binds the market for that good.

A binding price ceiling is one that is set below equilibrium price.

International day of sign language is celebrated annually across the world on 23rd september along with International Week of the Deaf.