CRUD is an acronym used for the four words: Create, Read, Update and Delete. CREATE command is used to create a table and is used to specify the schema and the data types of attributes. INSERT command uses the VALUES keyword to insert tuples/rows. The SELECT command is used for reading/ retrieving the rows from the database. UPDATE command is used to set some values for the attributes based on a specific condition. DELETE command is used to remove rows from the table based on a condition. CRUD operations are important while building websites. For eg: Adding and removing items from a cart on a shopping website.