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The following list provides helpful reminders
when you are using date/time functions: Input functions require leading zeros to match the fixed format of an
element. (Z is not supported.) For all date/time functions, when you provide only some elements
of the complete format in your
format specification, any unspecified elements are filled with default
values.
Arithmetic operations are possible with functions of type INTEGER.
The length of the data cannot exceed the length of the format specification
for that data. The maximum size of a format specification is 72 bytes.
Because LIKE works only with CHAR and VARCHAR values, if you want to use
LIKE with date/time data, you must first convert it to CHAR or VARCHAR.
For this you can use the TO_CHAR conversion function.
MIN, MAX, COUNT can be used with any DATE/TIME column type.
SUM, AVG can be used with INTERVAL data only.
Do not specify an indicator variable as a parameter of a date/time function
used in the select list of a query.
When using the ADD_MONTHS function,
if the addition of a number of months (positive or negative) would
result in an invalid day, the day field is set to the last day of the
month for the appropriate year, and a warning is generated indicating
the adjustment.
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