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Now that we know all about the views and DPTs, let’s look at how they are used to monitor various database table-related constructs.

Monitoring Tables with the V$ and DBA_ Views

Previously, when it came to tables, the DBA had four major concerns: Who owns them? Where were they created? Are they clustered? What is their space utilization? And, since Oracle8, the DBA also has to be concerned with issues such as: Is the table an object or relational table? Does the table contain REFs, VARRAYS, or NESTED TABLES?  Is the table (if relational) partitioned? The scripts and techniques in this section will answer these types of questions about tables.       

The Oracle Administrator toolbar provides the Schema Manager, which allows GUI-based management of database schema objects. The screen for Oracle version 7.3 of this product is shown in Figure 10.1. The Oracle Administrator product is great for on-screen viewing of database objects, but lacks suitable report capabilities, so the ability to monitor database objects via scripts is still critical. To this end, we will examine a few simple reports; first, though, take a look at Figure 10.2, which shows the cluster of DBA_ views used to monitor tables.

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