SQL Homework:

1.

Write INSERT statements that add two rows to the Members table for member IDs 1 and 2, two rows to the Groups table for group IDs 1 and 2, and three rows to the Group_Membership table: one row for member 1 and group 2; one for member 2 and group 1; and one for member 2 and group 2. Then, write a SELECT statement that joins the three tables and retrieves the group name, member last name, and member first name.

2.

Create sequences that can be used to number the member ID and group ID values starting with 3 (since you already added members and groups for IDs 1 and 2).

3.

Write an INSERT statement that adds another row to the Groups table. This statement should use the NEXTVAL pseudo column to get the value for the next group ID from the sequence that you created in exercise 5. Then, write a SELECT statement that gets all of the data for all of the rows in the Groups table to make sure your sequence worked correctly.

4.

Write an ALTER TABLE statement that adds two new columns to the Members table: one column for annual dues that provides for three digits to the left of the decimal point and two to the right; and one column for the payment date. The annual dues column should have a default value of 52.50.

5.

Write an ALTER TABLE statement that modifies the Groups table so the group name in each row has to be unique. Then, re-run the INSERT statement that you used in exercise 6 to make sure this works.