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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?
Time data typesThese topics explain how to use date, datetime, and interval data types in the Informix® ESQL/C program.
The SQL DATE data type

The SQL DATE data type

Informix® ESQL/C supports the SQL DATE data type with the Informix ESQL/C date data type for host variables. The date data type stores internal DATE values. It is implemented as a 4-byte integer whose value is the number of days since December 31, 1899. Dates before December 31, 1899, are negative numbers, while dates after December 31, 1899, are positive numbers. For a complete description of the SQL DATE data type, see the Informix Guide to SQL: Reference.

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