I need qUESTION 2 in the next 12 hours

Question 2: The following questions will help you to prepare your Upcoming Final Exam .

1.   Create an ORDERS_(your initials) table based on the following:.

            ORDID                                         NOT NULL          NUMBER(4)   

            ORDERDATE                                                            DATE

            COMMPLAN                                                             VARCHAR2(1)    

            CUSTID                                        NOT NULL          NUMBER(6)      

            SHIPDATE                                                                 DATE

2.   Create an INVOICE table based on the following:

            ORDID                                         NOT NULL                      NUMBER(4)

            ITEMID                                         NOT NULL                     NUMBER(4)

            DESCRIPTION                            NOT NULL                      VARCHAR2(20)    

            PRODID                                                                                 NUMBER(6)

            ACTUALPRICE                                                                    NUMBER(8,2)

            QTY                                                                                        NUMBER(8)

            ITEMTOT                                                                               NUMBER(8,2)

3.   Modify the INVOICE table to allow for longer DESCRIPTION names.

4.  Create an INVOICE_2 table from the INVOICE table using a select statement.

5

. 

            Rename the INVOICE_2 table to INVOICE_3.

6.   Add a comment to the INVOICE_3 table definitions describing the tables.

7. Drop the ITEMID  column from the INVOICE table.

8. Create an INVOICE_4 table using a subquery based on the structure of the INVOICE table. Include only the  ORDID, DESCRIPTION, PRODID and QTY columns. Name the columns in your new table INV ID, DESCRIPT, PROD ID and QUANTITY, respectively.

9.  Add a first row of data to the INVOICE table with data of your own choosing. Do not list the columns in the INSERT clause.

10

.  Populate the INVOICE table with the sample data.  You are to create the values to enter into the table.  This time, list the columns explicitly in the INSERT clause.

ORDID, DESCRIPTION, ITEMID, ACTUALPRICE, QTY, ITEMTOT, PRODID                                                                                                     

13.  Change the value for one of the DESCRIPTIONS.

14.  Create a PRIMARY KEY constraint on the INVOICE table using the ORDID column. The constraint should be named at creation as a named table level constraint.

15.  Add a named table level foreign key reference on the INVOICE table that will ensure that the PRODID is not assigned to a nonexistent PRODUCT.

16. 

Modify the INVOICE_3 table. Add an ORD_DATE column of DATE datatype.

17.  Modify the INVOICE  table. Add a CHECK constraint to prevent any ACTUALPRICE greater than what you think is a reasonable level.

18.  Modify the INVOICE table by making one of the columns NOT NULL.

19.  Create a view called INVOICE_View based on four columns in the INVOICE   table.  

20

.  Using your view INVOICE_View, enter a query to display values for three of the four columns included in the view.

21.  Create a view named INV_VIEW_QUERY  that does not allow an invoice DESCRIPTION to be changed  through the view.