Seven functions can be used with date/time
data types. These functions provide flexibility for inputting and
retrieving date/time data from the database.
These functions can be used with a preprocessed application or with ISQL.
This chapter outlines basic principles for using date/time functions
in an application program. The following sections are included:
Where Date/Time Functions Can Be Used.
Defining and Using Host Variables with Date/Time Functions.
Using Date/Time Input Functions.
Using Date/Time Output Functions.
Using the Date/Time ADD_MONTHS Function.
Program Examples for Date/Time Data.
Date/time functions are used as you would use an expression.
And when used in a select list, all date/time functions
produce data output.
Refer to the section in this chapter, "Defining and Using Host Variables with
Date/Time Functions."
Suppose for example that you are programming for an international corporation.
Your database tables contain various date/time columns and the data is
used by employees in several countries. You write a generic program
on which you base a set of customized programs, one for each geographical
location.
Each customized program allows the employees at a given location to
input and retrieve date/time information
in the formats with which they are most comfortable.
Refer to the "Host Variables" chapter for more information on date/time data
types.
Complete syntax and format specifications for date/time functions
are found in the ALLBASE/SQL Reference Manual in the "Expressions" and "Data Types" chapters.
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For all date/time functions, character input and output values are in
Native-3000
format.
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