Chapter 11, Problem 20SG

Explanation of Solution

Query Language:

A Query language is simple English like statements used to retrieve the information from database.

• Query language is used to interact with the database and it allows the user to do operations like insert new records to the database, update the content of the database, delete records from database and many more.
• A query is a request to get information from a database. The information can be retrieved from one table or combination of tables by SQL (Structured Query Language).
• Database query can be a select query or an action query. The select query is for getting the data from database and action queries do certain operations on retrieved data.

Structured Query Language (SQL):

SQL (pronounced as S-Q-L or Sequel) stands for Structured Query Language is a standard query language used to manipulate information in a database.

• SQL let the user to access the database and allows to do operations like insert, update, delete on the contents of a database...