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Client APIs and toolsYou can use the HCL OneDB™ implementation of client APIs to develop applications for HCL OneDB™ database servers.
ESQL/C GuideThe HCL OneDB™ ESQL/C Programmer's Manual explains how to use , the HCL OneDB™ implementation of Embedded Structured Query Language (SQL) for C (ESQL/C), to create client applications with database-management capabilities.
Database server communication
Working with the database serverThese topics explain how the HCL® OneDB® ESQL/C program can interact with a database server.
The client-server connectionThe application can establish a connection to any valid database environment. A database environment can be a database, a database server, or a database and a database server.
Sources of connection information about a UNIX™ operating system

Sources of connection information about a UNIX operating system

The sqlhosts file, which contains definitions for all valid database servers in the network environment
The ONEDB_SERVER environment variable, which specifies the default database server for the application

Many other environment variables can customize the database environment. For more information, see the HCL OneDB™ Guide to SQL: Reference and the HCL OneDB Administrator's Guide.

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