DATE FunctionsAs part of Domain Specific Functions Teradata database 14 has released new DATE functions.

Below re list of function. Baby free samples

 

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Basics

Function Description

LAST_DAY Return date of the last day of the month that contains timestamp value

NEXT_DAYreturns first weekday named by day_value that is later than the date

specified by date/timestamp value

NUMTODSINTERVALconvert a numeric value into an INTERVAL DAY(4) TO SECOND(6)

value

NUMTOYMINTERVAL Convert a numeric value into an INTERVAL YEAR(4) TO MONTH value

TO_DSINTERVAL Convert a string value into an INTERVAL DAY(4) TO SECOND(6) value.

TO_YMINTERVAL Convert a string value into an INTERVAL YEAR(4) TO MONTH value.

MONTHS_BETWEEN Return the number of months between two date/timestamp values.

OADD_MONTHSAdd a specified date/timestamp value to a specified number of months

and return the resulting date.

TO_DATE Convert a string into a DATE value via a format string.

TO_TIMESTAMP Convert a string into a TIMESTAMP value via a format string.

TO_TIMESTAMP_TZConvert a string into a TIMESTAMP WITH TIME ZONE value via a

format string.

TRUNCReturns a DATE value with the time portion truncated to the unit

specified by a format string.

ROUNDReturns a DATE value with the time portion rounded to the unit specified

by a format string.

Examples:

SELECT LAST_DAY (DATE);-----------------------LAST_DAY(Date)2014-06-30

SELECT NEXT_DAY(DATE '2014-06-10' , 'FRIDAY');----------------------------------------------NEXT_DAY(2014-06-10,'FRIDAY')2014-06-13

SELECT NUMTODSINTERVAL(86405,'SECOND'), NUMTOYMINTERVAL(100, 'MONTH' );----------------------------------------------------------------------------------------------------------------------NUMTODSINTERVAL(86405,'SECOND')               NUMTOYMINTERVAL(100,'MONTH')  1 00:00:05.000000                                                     8-04

SELECT TO_DSINTERVAL('150 08:30:00') , TO_YMINTERVAL( '2-11') ;----------------------------------------------------------------------------------------------TO_DSINTERVAL('150 08:30:00')                            TO_YMINTERVAL('2-11')150 08:30:00.000000                                                       2-11The above functions can be helpful while adding to any date columns.

samplesSELECT ORDER_DATE, ORDER_DATE + TO_YMINTERVAL('02-11') FROM ORDERS;SELECT EMP_ID, LAST_NAME FROM EMP_TABLE  WHERE HIRE_DATE + TO_DSINTERVAL('100 00:00:00')

SELECT MONTHS_BETWEEN(DATE'2014-06-01', DATE'2014-02-01');-------------------------------------------------------------MONTHS_BETWEEN(2014-06-01,2014-02-01)4.00

SELECT OADD_MONTHS (DATE '2014-04-15', 2), OADD_MONTHS (DATE '2008-02-29', 1);---------------------------------------------------------------------------------------------------------------------OADD_MONTHS(2014-04-15,2)                              OADD_MONTHS(2008-02-29,1)2014-06-15                                             2008-03-31Since 29 is the last day in February, March 31 is returned since 31 is the last day in March

SELECT TRUNC(CAST('2014/06/05' AS DATE), 'D') (FORMAT 'yyyy-mm-dd'); ----------------------------------------------------------------------------------------------------TRUNC('2014/06/05','D')

2014-06-01The date was rounded to the first day of that week.

SELECT ROUND(CAST('2003/09/20' AS DATE), 'RM') (FORMAT 'yyyy-mm-dd');----------------------------------------------------------------------------------------------------------ROUND('2003/09/20','RM')2003-10-01Since the day is greater than or equal to 16, the date is rounded to the beginning of the next month.