Clarify Projections.

Projections are the arrangement of characteristics that are duplicated or anticipated from the table to a record.

They are notwithstanding the record key traits and essential key characteristics which are consequently anticipated.

At whatever point you characterize a nearby optional record, it is required to determine the properties that are anticipated into the file.

Each file comprises at least 3 traits, and they are:

1. Table segment key worth
   
2. Ascribe to fill in as the record sort key
   
3. Table sort key worth