**First Problem**

Employee table contains the following information: state, lastname, firstname, hiredate, department, salary.

Get all employees that satisfy the following conditions:

- from the state of Kansas

- hired during the month of Mar-99

- sorted by lastname

- salary greater than 20,000

**Second Problem**

Each week a food wholesaler company fulfills orders from various customers. Normally, each customer orders the same quantity

of certain items each week. Occasionally, the quantity of an item that a customer orders is significantly less than the

customer's usual quantity. The information about each order is stored in a table named Invoice shown below:

CREATE TABLE Invoice (

InvoiceID int NOT NULL,

InvoiceNumber char(10) NOT NULL,

CustomerName char(30) NOT NULL,

InvoiceAmount money NOT NULL DEFAULT (0),

CONSTRAINT PK_Invoice PRIMARY KEY (InvoiceID)
)

You want to identify any pattern to these unusual orders. To do this, you need to produce a list of the invoices for each

customer that is for a lesser amount than the average invoice amount for that customer.