NUMTODSINTERVAL
Syntax
Purpose
NUMTODSINTERVAL
converts n
to an INTERVAL
DAY
TO
SECOND
literal. The argument n
can be any NUMBER
value or an expression that can be implicitly converted to a NUMBER
value. The argument interval_unit
can be of CHAR
, VARCHAR2
, NCHAR
, or NVARCHAR2
data type. The value for interval_unit
specifies the unit of n
and must resolve to one of the following string values:
-
'
DAY
' -
'
HOUR
' -
'
MINUTE
' -
'
SECOND
'
interval_unit
is case insensitive. Leading and trailing values within the parentheses are ignored. By default, the precision of the return is 9.
See Also:
Table 2-9 for more information on implicit conversion
Examples
The following example uses NUMTODSINTERVAL
in a COUNT
analytic function to calculate, for each employee, the number of employees hired by the same manager within the past 100 days from his or her hire date. Refer to "Analytic Functions" for more information on the syntax of the analytic functions.
SELECT manager_id, last_name, hire_date, COUNT(*) OVER (PARTITION BY manager_id ORDER BY hire_date RANGE NUMTODSINTERVAL(100, 'day') PRECEDING) AS t_count FROM employees ORDER BY last_name, hire_date; MANAGER_ID LAST_NAME HIRE_DATE T_COUNT ---------- ------------------------- --------- ---------- 149 Abel 11-MAY-04 1 147 Ande 24-MAR-08 3 121 Atkinson 30-OCT-05 2 103 Austin 25-JUN-05 1 . . . 124 Walsh 24-APR-06 2 100 Weiss 18-JUL-04 1 101 Whalen 17-SEP-03 1 100 Zlotkey 29-JAN-08 2