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What do you know about database and SQL?

What do you know about database and SQL?
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Answer #1 
database is an organized collection of data(tables), stored and accessed from a computer.
when databases become more complex, they are often developed using formal design and modeling techniques.
databases comprises of tables also called as relations.

SQL(Structured Query Language)
SQL is a Query language(a type of programming language) which is used in programming and designed for managing data held in a database management system.
A typical SQL query looks like the one below.

select Column1, Column2 from TableName

This query is used to retrieve Column1, Column2 from a table named TableName
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