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Administering
In addition to administering the database server, you can tune performance, replicate data, and archive data.
System administration
These topics contain concepts, procedures, and reference information for database and database server administrators to use for managing and tuning HCL Informix® database servers.
DB-Access User's Guide
The Informix® DB-Access User's Guide describes how to use the DB-Access utility to access, modify, and retrieve information from Informix database servers.
The full-screen menu interface
The DB-Access full-screen menu interface guides you through running SQL statements.
The Query-language option
Use the Query-language option to enter, modify, save, retrieve, and run SQL statements. DB-Access retains the statements, if any, in the editor. These statements are called the current statements.
What happens when errors occur
If you make any syntax or typing mistakes in an SQL statement, DB-Access does not process the statement. Instead, it continues to display the text of the statement with a message that describes the error.

Administering
In addition to administering the database server, you can tune performance, replicate data, and archive data.
- System administration
  These topics contain concepts, procedures, and reference information for database and database server administrators to use for managing and tuning HCL Informix® database servers.
  - List of utilities
    HCL Informix® includes utilities and applications that you can use to perform administrative tasks and capture information about configuration and performance.
  - Administrator's Guide
    The Informix® Administrator's Guide provides the information required to administer HCL Informix.
  - Administrator's Reference
    The Informix® Administrator's Reference includes comprehensive descriptions of HCL Informix configuration parameters, the system-monitoring interface (SMI) tables in the sysmaster database, the syntax of database server utilities such as onmode and onstat, logical-log records, disk structures, event alarms, and unnumbered error messages.
  - DB-Access User's Guide
    The Informix® DB-Access User's Guide describes how to use the DB-Access utility to access, modify, and retrieve information from Informix database servers.
    - Getting started with DB-Access
      DB-Access provides a menu-driven interface for entering, running, and debugging Structured Query Language (SQL) statements and Stored Procedure Language (SPL) routines. You can also run DB-Access interactively from the command line.
    - The full-screen menu interface
      The DB-Access full-screen menu interface guides you through running SQL statements.
      - The Query-language option
        Use the Query-language option to enter, modify, save, retrieve, and run SQL statements. DB-Access retains the statements, if any, in the editor. These statements are called the current statements.
        SQL editor
        When you choose the New of Modify option, you see the SQL editor. You can type as many lines of text as you need. You are not limited by the size of the screen, although you might be limited by the memory constraints of your system. If you do not use the Save option to save your typed statements, they are deleted when you select an option that clears the SQL editor (such as New or Choose).
        A system editor
        When you want to enter or modify a long SQL statement or series of statements, you might prefer the flexibility and familiarity of a system editor to the SQL editor. Select the Use-editor option from the SQL menu to use the system editor.
        Statements that the Run option supports
        After you exit the editor screen, the SQL menu reopens with the Run option highlighted and the statement text is displayed in the bottom of the screen. You can run most SQL statements with the Run option.
        Redirect query results
        The output from a SELECT statement is normally displayed on the screen. You can use the Output option on the SQL menu to route query results to the printer, store them in a system file, or pipe them to a program. The Output option has the same result as the OUTPUT statement of SQL.
        Choose an existing SQL statement
        Save the current SQL statement
        You can save SQL statements in a file for later use, such as to run the statements from the command line or retrieve the saved statements with the Choose option on the SQL menu.
        Support for SPL Routines
        What happens when errors occur
        If you make any syntax or typing mistakes in an SQL statement, DB-Access does not process the statement. Instead, it continues to display the text of the statement with a message that describes the error.
      - The Database option
        Use the Database option to work with databases and transactions.
      - The Table option
        Use the Table option to work with tables.
      - The Connection and Session options
        Use the Connection option if you want to connect to a specific database server and database or explicitly disconnect from the current database environment. Use the Session option to display information about the current DB-Access session.
    - Appendixes
  - High-Performance Loader User's Guide
    The describes how to use the HCL Informix® to load and unload large quantities of data efficiently to or from Informix databases.
  - Performance Guide
    The Informix® Performance Guide describes how to configure and operate your HCL Informix database server to improve overall system throughput and to improve the performance of SQL queries.
  - SNMP Subagent Guide
    The describes the Simple Network Management Protocol (SNMP) and the software that you need to use SNMP to monitor and manage HCL Informix® database servers and databases.
  - InformixHQ Guide
    InformixHQ is a modern web console for visualizing, monitoring, and managing your Informix server instances. It is purpose built for ease-of-use, scaling out, and optimizing DevOps needs. It provides critical performance management capabilities, monitoring how key performance metrics are changing over time and tracking how efficiently Informix is running your workload even when you’ve stepped away from your screen. Its monitoring system feeds directly into a customizable alerting system so you can be immediately alerted via email, Twilio, or PagerDuty whenever an issue occurs on one of your Informix database server instances. InformixHQ is designed to be scalable to efficiently manage and monitor as many Informix database server instances as you need. Moreover, it's a tool that can be shared by the DBAs, the app developers, the ops engineers, and management and accessed from any desktop, laptop, or mobile device. InformixHQ is the centralized hub for graphical monitoring, alerting, and administration of your Informix database servers.
- Backup and Restore Guide
  The Informix® Backup and Restore Guide describes how to use the Informix ON-Bar and ontape utilities to back up and restore database server data. These utilities enable you to recover your databases after data is lost or becomes corrupted due to hardware or software failure or accident.
- Enterprise Replication
  The HCL® Informix® Enterprise Replication Guide describes the concepts of data replication using Informix Enterprise Replication, including how to design your replication system, as well as administer and manage data replication throughout your enterprise.

What happens when errors occur

If you make any syntax or typing mistakes in an SQL statement, DB-Access does not process the statement. Instead, it continues to display the text of the statement with a message that describes the error.

If an execution or runtime error occurs, DB-Access continues to process the statement and returns an error message. For example, if you try to create a table that was already created, the following message is displayed at the bottom of the screen:

310: Table (mavis.mystock) already exists in database.

If you try to run a statement that contains more than one SQL statement, you might not see an error message immediately. If, for example, the first statement is a SELECT statement that runs correctly and the next statement contains a typing error, the data that the first statement retrieved shows on the screen before the error message is displayed for the second statement.

When DB-Access detects an error, processing stops and the Modify option on the SQL menu is highlighted. Select one of the following methods to correct the statement:

Press Enter to choose Modify, which returns you to the SQL editor.
Select the Use-editor option to use the default editor of your choice.