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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.
Basics of database design and implementation
Build a relational data model
Translate E-R data objects into relational constructs
Define tables, rows, and columns
Domain characteristics

Domain characteristics

You define the domain characteristics of columns when you create a table. A column can contain the following domain characteristics:

Data type (INTEGER, CHAR, DATE, and so on)
Format (for example, yy/mm/dd)
Range (for example, 1,000 to 5,400)
Meaning (for example, serial number)
Allowable values (for example, only grades S or U)
Uniqueness
Null support
Default value
Referential constraints

For information about how to define domains, see Select data types. For information about how to create your tables and database, see Implement a relational data model.

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