Following are the possible test scenarios to test Database:-
1) Exact data is saved in database on successful page submission.
2) Only after successful completion of operation data is saved in database.
3) To test values for columns which does not accept null values.
4) Tables should have a primary key column.
5) Data gets rolled back if transaction fails.
6) Null values should not be allowed for Primary key column.
7) Field length shown in front-end and in database schema should be same.
8) Test numeric fields with maximum, minimum and float values.
9) Test numeric fields with negative values.
10) To test that radio button and drop down options are saved properly in database.
11) To test that database fields are correctly designed with correct data type and length.