Datetime Value Expressions - HP Neoview SQL Reference Manual

Datetime Value Expressions

• "Considerations for Datetime Value Expressions"
• "Examples of Datetime Value Expressions"
The operands of a datetime value expression can be combined in specific ways with arithmetic
operators.
In this syntax diagram, the data type of a datetime primary is DATE, TIME, or TIMESTAMP.
The data type of an interval term is INTERVAL.
datetime-expression is:
datetime-primary
| interval-expression + datetime-primary
| datetime-expression + interval-term
| datetime-expression - interval-term
datetime-primary is:
datetime-literal
| column-reference
| datetime-type-host-variable
| dynamic parameter
| datetime-value-function
| aggregate-function
| sequence-function
| scalar-subquery
| CASE-expression
| CAST-expression
| (datetime-expression)
interval-term is:
interval-factor
| numeric-term
interval-factor is:
[+|-] interval-primary
interval-primary is:
interval-literal
| column-reference
| interval-type-host-variable
| dynamic parameter
| aggregate-function
| sequence-function
| scalar-subquery
| CASE-expression
| CAST-expression
| (interval-expression)
| OLAP-window-expression
Datetime value expressions are built from operands that can be:
• Interval value expressions
• Datetime or interval literals
• Dynamic parameters
• Column references with datetime or interval values
• Dynamic parameters
• Datetime or interval value functions
• Any aggregate functions, sequence functions, scalar subqueries, CASE expressions, or CAST
expressions that return datetime or interval values
• OLAP window functions
* interval-factor
Expressions 257