Data Manipulation Classes

DB Interface Module Reference Guide
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2.5 Data Manipulation Classes

The Data Manipulation Classes encapsulate common database operations. These classes are contained in the DB Interface Module, and explained in Chapter 5 of the DB Interface Module User's Guide. For detailed information on any class, see its entry in this Reference Guide. Table 4 lists and briefly describes the Database Classes.

Table 4: The Data Manipulation Classes

Class Name	Description
*RWDBSelectorBase*	The base class for *RWDBSelector* and *RWDBCompoundSelector*. This class should be treated as a pure virtual base class.
*RWDBSelector*	Encapsulates the SQL `SELECT` statement
*RWDBCompoundSelector*	Created as the result of the set operations `UNION`, `INTERSECTION`, and `DIFFERENCE` on *RWDBSelector*
*RWDBUpdater*	Encapsulates the SQL `UPDATE` statement
*RWDBInserter*	Encapsulates the SQL `INSERT` statement
*RWDBDeleter*	Encapsulates the SQL `DELETE` statement
*RWDBResult*	Represents a sequence of 0 or more tables of results
*RWDBReader*	Reads tabular data one row at a time
*RWDBCursor*	Represents a database cursor

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