Question Description
Make sure that you are using student database. DO NOT commit or rollback an operationuntil instructed to do so.
1. Describe the cost_table.
2. Start transaction
3. Write insert statements to place the following data into the cost_table: (See table correctly formatted in attached file)
SHIPPER MIN_SIZE MAX_SIZE MAX_WEIGHT TIME_FRAME COST_FACTORUS Mail 2 20 25 20 2Fly By Night 10 100 150 5 10Mail Box, Etc. 2 40 30 5 30Box Right 5 40 30 5 30Ship Aid 5 40 30 5 30
4. Write a single select statement that will verify your inserts.
5. Write a delete statement to remove just the new “Ship Aid” record.
6. Write a select statement to display the distinct shippers in the cost_table to verifythat the single Ship Aid record was deleted.
7. Write a statement to update the cost_factor to 5 for the US Mail record.
8. Write a select statement to verify the updated cost_factor field for the US Mail.
9. Rollback all changes to the cost_table for this transaction.
10. Write a single select statement that will verify that all changes to the cost_tablehave been rolled back.
11. Issue start transaction command.
12. Repeat exercise (2).
13. Issue a savepoint command. Name the savepoint ‘costs_ok’;
14. Write statements to make the following updates to cost_table (be careful withwhere):1. Make max_size = 50 for US Mail and Box Right.2. Make min_size = 100 for Fly By Night.3. Make cost_factor = 32 for Ship Aid.
15. Write a select statement to display the shippers and each modified field to verifythe changes.
16. Rollback the changes made to your savepoint.
17. Commit the changes from this transaction.
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