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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.
Basics of database design and implementation
Plan a database
Use ANSI-compliant databases
Differences between ANSI-compliant and non-ANSI-compliant databases
Privileges on objects

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.

Privileges on objects

ANSI-compliant databases and non-ANSI-compliant databases differ as to which users are granted table-level privileges by default when a table in a database is created. ANSI standards specify that the database server grants only the table owner (and the DBA if they are not the same user) any table-level privileges. In a database that is not ANSI-compliant, however, privileges are granted to PUBLIC. In addition, the database server provides two table-level privileges, Alter and Index, that are not included in the ANSI standards.

To run a user-defined routine, you must have the Execute privilege for that routine. When you create an owner-privileged procedure for an ANSI-compliant database, only the owner of the user-defined routine has the Execute privilege. When you create an owner-privileged routine in a database that is not ANSI-compliant, the database server grants the Execute privilege to PUBLIC by default.

Setting the NODEFDAC environment variable to 'yes' causes a database that is not ANSI-compliant to emulate the behavior of an ANSI-compliant database in not granting privileges to PUBLIC automatically when a user creates a table or an owner-privileged routine. For more information about privileges, see Grant and limit access to your database and the description of the GRANT statement in the Informix® Guide to SQL: Syntax.