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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
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.

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.
        Users and the public
        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

Connect privilege

The least of the privilege levels is Connect, which gives a user the basic ability to query and modify tables.

Users with the Connect privilege can perform the following functions:

Execute the SELECT, INSERT, UPDATE, and DELETE statements, provided that they have the necessary table-level privileges.
Execute an SPL routine, provided that they have the necessary table-level privileges.
Create views, provided that they are permitted to query the tables on which the views are based.
Create temporary tables and create indexes on the temporary tables.

Before users can access a database, they must have the Connect privilege. Ordinarily, in a database that does not contain highly sensitive or private data, you give the GRANT CONNECT TO PUBLIC privilege shortly after you create the database.

If you do not grant the Connect privilege to PUBLIC, the only users who can access the database through the database server are those to whom you specifically grant the Connect privilege. If limited users should have access, this privilege lets you provide it to them and deny it to all others.