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Designing databases
The 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 Database
The Informix® Database Design and Implementation Guide provides information to help you design, implement, and manage your Informix 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 Informix®
Complex data types
Named row types
Restrictions on named row types

Designing databases
The 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 Database
  The Informix® Database Design and Implementation Guide provides information to help you design, implement, and manage your Informix 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
  - Managing databases
  - Object-relational databases
    - Create and use extended data types in Informix®
      - HCL Informix® data types
      - Smart large objects
      - Complex data types
        Collection data types
        Named row types
        When to use a named row type
        Select a name for a named row type
        Restrictions on named row types
        Restrictions on data types
        Restrictions on constraints
        Restrictions on indexes
        Restrictions on serial data types
        A named row type that contains a SERIAL, SERIAL8, or BIGSERIAL data type cannot be used as a column type in a table.
        Use a named row type to create a typed table
        Change the type of a table
        Use a named row type to create a column
        Use a named row type within another row type
        Drop named row types
        Unnamed row types
    - Type and table inheritance
    - Create and use user-defined casts

Restrictions on named row types

This section describes the restrictions that apply when you use named row types.