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Client APIs and toolsYou can use the HCL Informix® implementation of client APIs to develop applications for Informix® database servers.
ESQL/C GuideThe Informix® ESQL/C Programmer's Manual explains how to use Informix® ESQL/C, the Informix® implementation of Embedded Structured Query Language (SQL) for C (ESQL/C), to create client applications with database-management capabilities.
What is Informix® ESQL/C?
Compile programs
The esql command
Options that affect preprocessing
Check the version number

Check the version number

Use the -V option to obtain the Informix® version number and serial number for your Informix ESQL/C product, as the following example shows:

esql -V

The -version option provides more detailed version information that might be needed when dealing with HCL Informix technical support.

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