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Designing databasesThe first step in creating a relational database is to construct a data model, which is a precise, complete definition of the data you want to store. After you prepare your data model, you must implement it as a database and tables. To implement your data model, you first select a data type for each column and then you create a database and tables and populate the tables with data. You can also implement fragmentation strategies and control access to your data.
Designing and Implementing a DatabaseThe HCL OneDB™ Database Design and Implementation Guide provides information to help you design, implement, and manage your HCL® OneDB® databases. It includes data models that illustrate different approaches to database design and shows you how to use structured query language (SQL) to implement and manage your databases.
Object-relational databases
Create and use extended data types in HCL OneDB™
HCL OneDB™ data types
Extended data types

Extended data types

Extended data types let you create data types to characterize data that cannot be easily represented with the built-in data types. However, you cannot use extended data types in distributed transactions. The following figure shows the extended data types.

This figure shows rectangles that represent categories of data. Lines connecting the rectangles illustrate parent and child relationships. At the top of the chart is "DATA TYPES". "DATA TYPES" has two children: "Built-in data types" and "Extended data types." The "Built-in data types" rectangle has no children. "Extended data types" has two children: "Complex data types" and "User-defined data types". "Complex data types" has two children: "Collection types" and "Row Types." "Collection types" has three children: "LIST", "SET", and "MULTISET". "Row types" has two children: "Unnamed Row" and "Named Row." "User-defined data types" has two children: "Distinct" and "Opaque." "Opaque" has one child: "DataBlade data types". — Figure 1: Extended data types

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