MIN (Dates)
Returns the earliest date found in a field or group. You can apply a filter to limit the rows in the search. You can nest only one other aggregate function within MIN, and the nested function must return a date datatype.
You can also use MIN to return the smallest numeric value or the lowest string value in a field or group.
Use only in Mapping Configuration tasks.
Syntax
MIN( date [, filter_condition] )
Argument | Required/ Optional | Description |
|---|
date | Required | Date/Time datatype. Passes the values for which you want to return minimum value. You can enter any valid transformation expression. |
filter_condition | Optional | Limits the rows in the search. The filter condition must be a numeric value or evaluate to TRUE, FALSE, or NULL. You can enter any valid transformation expression. |
Return Value
Date if the value argument is a date.
NULL if all values passed to the function are NULL, or if no rows are selected (for example, the filter condition evaluates to FALSE or NULL for all rows).
Nulls
If a single value is NULL, MIN ignores it. However, if all values passed from the field are NULL, MIN returns NULL.
Group By
MIN groups values based on group by fields you define in the transformation, returning one result for each group.
If there is no group by field, MIN treats all rows as one group, returning one value.
Example
The following expression returns the oldest order date for flashlights:
MIN( ORDER_DATE, ITEM_NAME='Flashlight' )
ITEM_NAME | ORDER_DATE |
|---|
Flashlight | Apr 20 1998 |
Regulator System | May 15 1998 |
Flashlight | Sep 21 1998 |
Diving Hood | Aug 18 1998 |
Halogen Flashlight | Feb 1 1998 |
Flashlight | Oct 10 1998 |
Flashlight | NULL |
RETURN VALUE: Feb 1 1998 | |