Home
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
Database-level privileges
Database-administrator privilege
The highest level of database privilege is database administrator, or DBA. When you create a database, you are automatically the DBA.

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
    - Table fragmentation strategies
    - Grant and limit access to your database
      - Use SQL to restrict access to data
      - Control access to databases
      - Grant privileges
        Database-level privileges
        Connect privilege
        The least of the privilege levels is Connect, which gives a user the basic ability to query and modify tables.
        Resource privilege
        The Resource privilege carries the same authorization as the Connect privilege. In addition, users with the Resource privilege can create new, permanent tables, indexes, and SPL routines, thus permanently allocating disk space.
        Database-administrator privilege
        The highest level of database privilege is database administrator, or DBA. When you create a database, you are automatically the DBA.
        Ownership rights
        Table-level privileges
        Column-level privileges
        Type-level privileges
        Routine-level privileges
        Language-level privileges
        Automate privileges
        Determine current role at runtime
      - Use SPL routines to control access to data
      - Views
      - Privileges and views
    - Distributed queries
  - Object-relational databases

Database-administrator privilege

The highest level of database privilege is database administrator, or DBA. When you create a database, you are automatically the DBA.

Holders of the DBA privilege can perform the following functions:

Execute the DROP DATABASE, START DATABASE, and ROLLFORWARD DATABASE statements.
Drop or alter any object regardless of who owns it.
Create tables, views, and indexes to be owned by other users.
Grant database privileges, including the DBA privilege, to another user.

Only the user informix can modify system catalog tables directly. If you are user informix, Informix® strongly recommends that you not modify the contents or schema of any system catalog table, because such actions can affect the integrity of the database.