By Cary Jensen
This technically reviewed and ADS-endorsed source gives you to-the-point details on utilizing advertisements to construct awesome databases with remarkable balance, scalability, and function. learn how to set up Advantage-enabled functions as stand-alone, peer-to-peer, client/server, and web purposes with only one set of resource code. Plus-CD-ROM includes a trial model of advertisements, in addition to the entire present database connectivity drivers, database administration instruments, and configuration instruments.
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Extra info for Advantage Database Server: The Official Guide
3. To test the speed aspect of the index, enter Customer ID = 15198 in the field below the Set Filter button (shown in Figure 3-4). Now click Set Filter. Two things should happen. First, only the record for the customer whose Customer ID field contains the value 15198 will be displayed, as shown in Figure 3-5. Second, a green circle should appear to the right of the Set Filter button. ”) This green circle indicates that the filter used an AOF (Advantage Optimized Filter). AOFs are one of the important performance-related objects that ADS can create from indexes.
By comparison, if you are importing from Paradox tables using the Borland Database Engine, you will get one ADT table for each Paradox table you select to import. The Advantage Data Architect permits you to import data using a wide variety of data access mechanisms. One of the most flexible involves ADO (ActiveX data objects), which you can use if you have the necessary Chapter 2: Creating Tables 39 40 Chapter 2: Creating Tables OLE DB provider. This is the most flexible approach since most Windows databases have an OLE DB provider.
For example, you can have a custom index named ShowCustomers. You can then add keys for each customer that you want displayed in the table when the index is applied. As is the case with the other indexes discussed in this section, the keys of a custom index are defined using an index key expression. You add a custom key using the ACE (Advantage Client Engine) API by calling AdsAddCustomKey. This method adds a key to the custom index that references the current record of a table. Similarly, AdsDeleteCustomKey removes a key for the current record from the custom index.
Advantage Database Server: The Official Guide by Cary Jensen