Create the DEALERSHIPS star schema dimension table via SQL.

1) Execute SELECT COUNT(*) FROM <table_name>; statements for all 6 of your OVS, Inc. OLTP tables. You should have at least the following counts: CUSTOMERS table – 100 rows, VEHICLES table – 50 rows, SALESPERSONS table – 10 rows, FINANCING_PLANS – 5 rows, SALES table – 200 rows, and SALES_FINANCINGS table – 200 rows.

2) Via a single SELECT query display the zip code, make, and count with the largest total car purchases for a zip code and make combination (there may be a tie with two or more). Show the SQL statement you used and the results returned by Oracle from executing your SQL statement right after the statement.

3) Develop a PL/SQL anonymous block that displays the total sales for a zip code for a specific zip code. You may use any of your zip codes you wish. Show the PL/SQL statements in your block, the actual execution of your block, and the results returned.

4) Develop a PL/SQL anonymous block that displays the zip code with the largest total car purchases. Since there can be a tie with two or more zip codes, ensure that the lowest numeric zip code is displayed. Show the PL/SQL statements in your block, the actual execution of your block, and the results returned.

5) This step begins the creation of your data warehouse. Ensure that your FINANCING_PLANS table has already been created and populated via a “SELECT * FROM financing_plans;” SQL query. This table is used by both your OLTP database and serves as a dimension table in the star schema of your data warehouse database. Your Plan_ID primary key is the Plan_Code column. Don’t worry about changing this to Plan_Code or changing any other column names you already have.

6) Create the DEALERSHIPS star schema dimension table via SQL. Add at least 2 rows of data via INSERT statement(s). After populating your DEALERSHIPS table execute a “SELECT * FROM dealerships;” SQL statement to display the entire contents. Show all your SQL code for this step and the Oracle results from executing it.

7) Create the VEHICLES star schema dimension table via SQL. Change your existing OLTP VEHICLES table to OLTP_VEHICLES via the SQL RENAME command and change your SALES table’s foreign key to reference this new table name. For the Vehicle_Code primary key column use an Oracle sequence to populate the values. For the Description column use all concatenated combinations of Make and Model of vehicles you have. Use a PL/SQL block to populate the Description column by SELECTing the combinations from your OLTP_VEHICLES table and then INSERTing the combinations into your new VEHICLES table, which would best be performed via a cursor in a loop. After populating your VEHICLES table execute a “SELECT * FROM vehicles ORDER BY vehicle_code” SQL statement to display the entire contents.