Every persistent object in the Pega 7 Platform database has an associated class (Rule-Obj-Class rule type). The Pega 7 Platform uses a simple algorithm and information in Data-Admin-DB-Table instances to determine which table contains objects of which classes.
When in memory and on the clipboard, objects are known as instances and have an XML-like structure consisting of property names and text property values. These can be reviewed with the Clipboard tool.
When saved into the database, objects become rows of a table, with columns corresponding to scalar properties.
Every database table that you add to the Pega 7 Platform database must contain these five columns:
VARCHAR2(96).DATE. This column has a different name in a few tables.VARCHAR2(64)VARCHAR2 (255) NOT NULL. The pzInskey column is identified as the unique key to the table by using a constraint.BLOB).