OMIS-452-SP16 - Week 4b - OMIS 452 Database Management for...

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OMIS 452 Database Management for Business Northern Illinois University Brian Bender
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Agenda SQL Queries (Review) Ch. 3 – The Relational Model & Normalization A Look Ahead OMIS-452 Week 4b 2
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SQL Queries How Do I Select All Columns & Rows From A Table? Select Column(s) From Table; Retail_Order How Many Records? Order_Item How Many Records? OMIS-452 Week 4b 3
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SQL Queries How Do I Select All Columns & Rows From Multiple Tables? Select Column(s) From Table(s); Retail_Order And Order_Item How Many Rows Returned? Why? Product of Retail_Order (3) * Order_Item (7) = 21 OMIS-452 Week 4b 4
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SQL Queries How Do I Select All Columns & Rows From Multiple Tables WITHOUT Duplicates? Select Column(s) From Table(s) Where Condition(s); Retail_Order And Order_Item Where OrderNumber Is The Same Join On OrderNumber OMIS-452 Week 4b 5
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SQL Queries Select * From Retail_Order, Order_Item Where Retail_Order.OrderNumber = Order_Item.OrderNumber; Select * From Retail_Order Join Order_Item On Retail_Order.OrderNumber = Order_Item.OrderNumber; OMIS-452 Week 4b 6
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Normalization What Is It? Why Do We Need To Do It? Why Is It So Important? What Might Make It Easier? What Do We Need To Know BEFORE We Do It? OMIS-452 Week 4b 7
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Ch. 3 – The Relational Model Normal Forms Categorized Relations Based On The Existence Of Problems (Modification Anomalies) What Are The Modification Anomalies?
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