2- Using the output shown below as your guide, generate a list of customer purchases, including the subtotals for each of the invoice line numbers. The subtotal is a derived attribute calculated by multiplying LINE_UNITS by LINE_PRICE. Sort the output by customer code, invoice number, and product description. Be certain to use the column aliases as shown in the figure. P DESCRPT 1002 Rat-tail file, 1/8-in. fine 1004 Claw hammer 1004 Rat-tail fle, 1/8-in. fine 1008 Claw hammer CUS_CODE INV_NUMBER 10011 Units Bought Unit Price 4.99 Subtotal 2 9.98 10011 2 9.95 19.90 10011 3 4.99 14.97 10011 9.95 9.95 10011 1008 PVC pipe, 3.5-in., 8-fA 1008 Steel matting, 4x8x1/6", 5" mesh 1003 7.25-in. pwr. saw blade 1003 B&D cordless drill, 1/2-in. 1003 Hrd. cloth, 1/4-in., 2x50 1001 7.25 in. pwr. saw blade 1001 Claw hammer 5.87 29.35 359.85 74.95 10011 3 119.95 10012 5 14.99 10012 1 38.95 38.95 10012 1 39.95 39.95 10014 14.99 14.99 9.95 6.99 109.92 10014 1 9.95 20.97 109.92 10014 1006 1.25-in. metal screw, 25 3 1006 B&D jigsaw, 12-in. blade 1006 Claw hammer 1006 Hicut chain saw, 16 in. 1007 7.25-in. pwr. saw blade 1007 Rat-tail file, 1/8-in. fine 1005 PVC pipe, 3.5-in., 8-ft 10014 1 10014 1 9.95 9.95 10014 1 256.99 256.99 10015 2 14.99 29.98 10015 1 4.99 499 10018 12 5.87 7044

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Basic SQL Queries

Structured Query Language is the full form of SQL. It is a high-level language used to communicate with a relational database. It is used for creating, storing and accessing contents of a relational database. SQL is used to write the queries which are executed using database engines like Oracle, SQL Server and so forth.