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Custom Function API Reference

Transformation Language Reference

10.5
- 10.5.6
- 10.5.1
- 10.4.0

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LAST_DAY

Returns the date of the last day of the month for each date in a port.

Syntax

LAST_DAY( date )

The following table describes the argument for this command:

Argument	Required/ Optional	Description
date	Required	Date/Time datatype. Passes the dates for which you want to return the last day of the month. You can enter any valid transformation expression that evaluates to a date.

Return Value

Date. The last day of the month for that date value you pass to this function.

NULL if a value in the selected port is NULL.

Null

If a value is NULL, LAST_DAY ignores the row. However, if all values passed from the port are NULL, LAST_DAY returns NULL.

Group By

LAST_DAY groups values based on group by ports you define in the transformation, returning one result for each group. If there is no group by port, LAST_DAY treats all rows as one group, returning one value.

Examples

The following expression returns the last day of the month for each date in the ORDER_DATE port:

LAST_DAY( ORDER_DATE )

ORDER_DATE	RETURN VALUE
Apr 1 1998 12:00:00AM	Apr 30 1998 12:00:00AM
Jan 6 1998 12:00:00AM	Jan 31 1998 12:00:00AM
Feb 2 1996 12:00:00AM	Feb 29 1996 12:00:00AM (Leap year)
NULL	NULL
Jul 31 1998 12:00:00AM	Jul 31 1998 12:00:00AM

You can nest TO_DATE to convert string values to a date. TO_DATE always includes time information. If you pass a string that does not have a time value, the date returned will include the time 00:00:00.

The following example returns the last day of the month for each order date in the same format as the string:

LAST_DAY( TO_DATE( ORDER_DATE, 'DD-MON-YY' ))

ORDER_DATE	RETURN VALUE
'18-NOV-98'	Nov 30 1998 00:00:00
'28-APR-98'	Apr 30 1998 00:00:00
NULL	NULL
'18-FEB-96'	Feb 29 1996 00:00:00 (Leap year)

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Table of Contents

Transformation Language Reference

Transformation Language Reference

LAST_DAY

LAST_DAY

Syntax

Return Value

Null

Group By

Examples