SQL allows the storage and retrieval of data within a very large database. Business applications have to draw from an enormous storehouse of data to run efficiently and pull information quickly. Users make commands to create and delete tables and elements within tables. It is useful to make sure that you complete input sanitization before manipulating data in SQL. Database keys are used as labels or tags for each piece of data or cell within a table; they can also be used to connect separate tables or elements in a table.Learn more about SQL now.