SQL stands for ‘Structured Query Language’ which was developed by IBM in 1974. It is used for maintaining data in a relational database management

What is SQL? Introductions of SQl

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Rocky
2021-06-02 05:06:41

SQL stands for ‘Structured Query Language’ which was developed by IBM in 1974. It is used for maintaining data in a relational database management system. SQL allows us to retrieve multiple data entries from a database using a single command.

In SQL, we write commands in the form of queries. These queries are responsible for making any changes that will happen in our database. We can write queries to create a database, insert tables into our database, add/delete/modify our data, drop the database. SQL queries can be written in uppercase as well as lowercase format.

The data is stored in a database in the form of tables. The tables consist of similar types of related data which stores data in the form of columns and rows. 

Columns define the type of the data which it will store. A column stores similar types of data in a vertical format. Columns are also known as ‘records’. 

For example, if a column has been set as integer data-type, then it will only store integer data and not any other data-type. 

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