Advanced Query Analysis

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Presentation transcript:

Advanced Query Analysis IS240 – DBMS Supplement to Chapter 5 M. E. Kabay, PhD, CISSP-ISSMP Assoc. Prof. Information Assurance Division of Business & Management, Norwich University mailto:mkabay@norwich.edu V: 802.479.7937 Class Notes Copyright © 2004 M. E. Kabay. All rights reserved. Page 1

Topics Sally’s Pet Store: Problem 5-01 Start with Calculation of Order Values Save the Query Document the Query Query is Saved Then Use the Stored Query in the Complete Query Use TOP operator to Restrict Output Copyright © 2004 M. E. Kabay. All rights reserved. Page 2

Sally’s Pet Store: Problem 5-01 Which supplier has the highest average percentage of shipping cost per value of merchandise order? First, compute the value of each order Store the query as Query05_01a Then use the synthetic table of values from Query05_01a to prepare a new synthetic table Combines the supplier info with the order info Allows computation of percentage Sort data Copyright © 2004 M. E. Kabay. All rights reserved. Page 3

Start with Calculation of Order Values Copyright © 2004 M. E. Kabay. All rights reserved. Page 4

Save the Query Copyright © 2004 M. E. Kabay. All rights reserved. Page 5

Document the Query Copyright © 2004 M. E. Kabay. All rights reserved. Page 6

Query is Saved Copyright © 2004 M. E. Kabay. All rights reserved. Page 7

Then Use the Stored Query in the Complete Query Copyright © 2004 M. E. Kabay. All rights reserved. Page 8

Use TOP operator to Restrict Output Copyright © 2004 M. E. Kabay. All rights reserved. Page 9

DISCUSSION Copyright © 2004 M. E. Kabay. All rights reserved. Page 10