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:
- Table segment key worth
- Ascribe to fill in as the record sort key
- Table sort key worth