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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.
Managing databases
Grant and limit access to your database
Grant privileges
Language-level privileges

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.

Language-level privileges

supports UDRs written in the built-in Stored Procedure Language (SPL) and also UDRs (referred to as external routines) that are written the C and Java™ languages. To create any UDR, a user must hold the Resource privilege (or else DBA privilege) on the database. In addition, to create a UDR, the user must also receive the Usage privilege on the programming language from the corresponding GRANT statement:

GRANT USAGE ON LANGUAGE C for C routines
GRANT USAGE ON LANGUAGE JAVA for Java™ l routines
GRANT USAGE ON LANGUAGE SPL for SPL routines

In addition to holding the required language-level privileges, if the IFX_EXTEND_ROLE configuration parameter has been enabled (either by default, or by being set to 1 or to ON), only users to whom the DBSA has granted the built-in EXTEND role can create, alter, or drop external routines.