Hp Intelligent Management Center Standard Software Pl Bedienungsanleitung Seite 664

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Seitenansicht 663
Pointer to Order#Customer
10444Allez Distribution
10470BG Mountain Inc.
10511BG Mountain Inc.
10501La Bomba de Bicicleta
10488Mountain Toad
10568Mountain Tops Inc.
10495SFB Inc.
10544Sierra Bicycle Group
10579Sierra Bicycle Group
10485Sierra Mountain
In this index, information is organized by customers, not order numbers.
Also, notice that the second column actually contains pointers to specific
order numbers in the original table. By using this index, the database engine
can search just the information in the Customer column until it finds the
customer you are interested in, Sierra Bicycle Group.
For each correct customer entry the database engine finds in the index, it
looks up the matching order in the table according to the pointer in the second
column of the index. Only the orders for the correct customer are read. Finally,
664 Crystal Reports 2008 SP3 User's Guide
Understanding Databases
25
Databases overview
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