In the following exercises, you will use the data in the Premiere Products database shown in Figure 2-1 in Chapter 2. (If you use a computer to complete these exercises, use a copy of the original Premiere Products database so you will still have the original data when you complete Chapter 4.) In each step, use SQL to obtain the desired results. You can use a DBMS to complete the exercises using a computer, or you can simply write the SQL command to complete each step. Check with your instructor if you are uncertain about which approach to take.
List the item class and the sum of the number of units on hand. Group the results by item class.
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