Amazon Redshift External tables allow you to access files stored in S3 storage as a regular table. You can join the Redshift external table with a database tables such as permanent or temporary table to get required information. You can also perform a complex transformation involving various tables. The External tables are commonly used to build the data lake where you access the raw data which is stored in the form of file and perform join with existing tables. There are many situations in which you need to access the…