Data, Data, Data
The
purpose of a database is to keep the data. The database has only
one job: the data, the data, the data.
If you
delete any record, the database will ask you to confirm. If you
change or modify a Table Field, you will be prompted to save your
changes.
Data
Validation is one method worth considering when you design Tables.
This is a
good start to understanding Tables. But, it is just the beginning.