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JoeGarrepy.com Oracle Nested Tables Example
Another new feature of Oracle is the ability to build Nested Tables or tables that have columns that are tables. This is neat because you can build a relational data structure inside of one table. The example below builds a table called ENTITY. The data stored in this table traditionally would have to be stored in 4 different tables (base entity table, a repeating name table, a repeating person data table and a repeating employment data table). Instead only the base entity table exists with its children as columns nested inside of it. The script below not only creates a table with multiple nested tables as columns but shows how to select from it and perform DML on the table and precision DML on the nested tables.