How to handle date related relational and dimensional functions

Report Studio :Cognos Time and Date Functions

Cognos date and time functions

Date and Time Functions
cast(extract(year,current_ timestamp),varchar(4))	>>> 2014
extract(hour,current_timestamp)	>>> 10
extract(day,current_timestamp)	>>> 13
cast(extract(month,current_ timestamp),varchar(2))	>>> 7
cast(current_timestamp,varchar(50))	>>> 2012-07-13 10:44:32.991000000+04:70
cast(extract(hour,current_ timestamp),varchar(2))	>>> 10
Last Day of Current Month	_last_of_month (current_timestamp)
Date Minus 24 Hours	_add_days ((current_timestamp),-1)
Extract minute as two digit alpha:	case (CAST(extract ( minute, current_timestamp), VARCHAR(2))) when '0' then ('00') when '1' then ('01') when '2' then ('02') when '3' then ('03') when '4' then ('04') when '5' then ('05') when '6' then ('06') when '7' then ('07') when '8' then ('08') when '9' then ('09') else (CAST(extract ( minute, current_timestamp), VARCHAR(2))) end
get prior month based on current month	extract(month,_add_months( current_timestamp,-1))
This CASE function extracts the first two characters of the current date and translates it into a financial period:	CASE (substring(cast(current_ timestamp,varchar(50)),6,2)) WHEN '07' THEN '04' WHEN '08' THEN '05' WHEN '09' THEN '06' WHEN '10' THEN '07' WHEN '11' THEN '08' WHEN '12' THEN '09' WHEN '01' THEN '10' WHEN '02' THEN '11' WHEN '03' THEN '12' WHEN '04' THEN '01' WHEN '05' THEN '02' WHEN '06' THEN '03' ELSE '14' END
Calculate the financial year based on the current date	Apr-Mar if (extract(month,current_timestamp)♥) then ( timestamp)-1,varchar(4))+'-'+ timestamp),varchar(4)) ) else ( timestamp),varchar(4))+'-'+ timestamp)+1,varchar(4)) ) Dec-Nov if (extract(month,current_timestamp)<11) then ( timestamp)-1,varchar(4))+'-'+ timestamp),varchar(4)) ) else ( timestamp),varchar(4))+'-'+ timestamp)+1,varchar(4)) )
First day of this year	_add_days(Current_date ; (_day_of_year(Current_date)*-1)+1 )
First day of last year (only used in january):	_first_of_month(_add_years(current_date;-1)) OR _last_of_month(_add_months (current_date;-1))
date-to-string	substring(cast(extract(month,[Project Start Date]),VARCHAR(10)),1,2) + '/' + substring(cast(extract(year,[Project Start Date]),VARCHAR(10)),3,2) + ' - ' + substring(cast(extract(month,[Project End Date]),VARCHAR(10)),1,2) + '/' + substring(cast(extract(year,[Project End Date]),VARCHAR(10)),3,2) OR substring(cast(extract(month,[Project Start Date]),VARCHAR(10)),1,2) + '/' + substring(cast(extract(year,[Project Start Date]),VARCHAR(10)),3,2) + ' - ' + substring(cast(extract(month,[Project End Date]),VARCHAR(10)),1,2) + '/' + substring(cast(extract(year,[Project End Date]),VARCHAR(10)),3,2)

CAST and EXTRACT Functions:

Where [Time stamp] = Jun 8, 2009 5:26:47 PM                                

           

Expression	Result
cast(extract( year, [Time stamp]), varchar(4))	2009 (alpha)
extract( hour, [Time stamp])	17 (numeric)
extract( day, [Time stamp])	8 (numeric)
cast(extract(month,[Time stamp]),VARCHAR(2))	6 (alpha – note lack of leading zero)
cast([Time stamp], date)	Jun 8, 2009 (‘date’ is a data type)
cast ([Time stamp], varchar(50))	2009-06-08 00:00:00.000000000
cast(extract (hour,[Time stamp]), VARCHAR(2))	5 (alpha)

Extract minute as two digit alpha:

case (CAST(extract ( minute, [Audit].[Run Reports].[Time stamp]), VARCHAR(2)))

when '0' then ('00')

when '1' then ('01')

when '2' then ('02')

when '3' then ('03')

when '4' then ('04')

when '5' then ('05')

when '6' then ('06')

when '7' then ('07')

when '8' then ('08')

when '9' then ('09')

else (CAST(extract ( minute, [Audit].[Run Reports].[Time stamp]), VARCHAR(2)))

end

or

TO_CHAR([Time stamp], ‘MM’)

Last Day of Current Month:

_last_of_month(date2timestamp(Today()))

Date Minus 24 Hours:

_add_days([Audit].[COGIPF_RUNREPORT].[TIME STAMP],-1)

Use a date in a filter:

[Audit].[Run Reports].[Time stamp] > cast('2010-05-01', timestamp)

or

cast ([CURRENT_HIRE_DATE], varchar(50)) > '2005-11-10 00:00:00.000000000'

Note: Strangely, [Audit].[Run Reports].[Time stamp] = cast('2010-05-01', timestamp)

does not work as a filter. However, the following does work:

Between Function:

[Time stamp] between (cast('2010-05-10', timestamp)) and (cast('2010-05-11', timestamp))

To restrict a report based on a hard coded date (ex. 5/10/2010):

cast ([Time stamp], varchar(50)) = '2010-05-10 00:00:00.000000000'

To filter records based on dates in prior month (based on system date):

extract(month, _add_months(current_date, -1)) = cast(extract(month,[Time stamp]),varchar(2))

To filter records based on a timestamp when using date prompts on a prompt page:

Filter1: [TIME STAMP] >= cast((?beginDate?) as TIMESTAMP)

Filter2: [TIME STAMP] <= _add_days(cast((?endDate?) as TIMESTAMP),1)

(A day is added to the end date to allow for the use of a single day range. That is, the

beginDate will be Apr 27, 2012 12:00:00 AM if April 27 is selected. If April 27 is also

selected as the end date, 24 hours must be added so that the end date used in the filter

is Apr 28, 2012 12:00:00 AM)

SYSDATE:

This CASE function extracts the first three characters of the current date and translates it

into a fiscal period:

CASE (substr({sysdate},4,3))

WHEN 'JUL' THEN '01'

WHEN 'AUG' THEN '02'

WHEN 'SEP' THEN '03'

WHEN 'OCT' THEN '04'

WHEN 'NOV' THEN '05'

WHEN 'DEC' THEN '06'

WHEN 'JAN' THEN '07'

WHEN 'FEB' THEN '08'

WHEN 'MAR' THEN '09'

WHEN 'APR' THEN '10'

WHEN 'MAY' THEN '11'

WHEN 'JUN' THEN '12'

ELSE '14'

END

To calculate the fiscal year based on the current date (fiscal year for 2009/2010 is 2010):

IF (extract( month, {sysdate}) < 7)

THEN (cast(extract(year, {sysdate}), varchar(4)))

ELSE (cast(extract(year, {sysdate})+1, varchar(4)))

This function will return the date of the same day of the week a year ago and controls for

leap years. For example, if today is Tuesday, 07/31/2012 then the function returns

08/02/2012 (Tuesday) – trunc removes the time portion of the date value:

trunc(_add_days({sysdate},-364))

TO_CHAR:

General format is TO_CHAR(datetime, ‘format element’)

Example: TO_CHAR(current_date, ‘YYYYMM’) = 201012 (December, 2010)

Element Description

D            Number of day of the week

DD          Number of day of the month

DAY        Name of the day (ex. FRIDAY)

HH          Hour of day (1-12)

HH24       Hour of day (0-23)

MI           Minute (0-59)

MM         Month (January = 01…December = 12)

MONTH   Name of month

MON       Abbreviated name of month

SS          Seconds

WW        Week of year (1-53)

W           Week of month (1-5 where week 1 starts on first day of month and ends

on seventh)

YYYY     4-digit year (YY returns last two digits of 4-digit year)

Year and Month in YYYYMM format:

Current year/month – to_char(current_date,'YYYYMM') ex: 200910

Previous month - to_char(add_months(current_date,-1),'YYYYMM') ex: 200909

Previous year/month- to_char(add_months(current_date,-13),'YYYYMM') ex: 200809

OTHER

Age in years:
_age([BENEFICIARY_BIRTH_DATE]) / 100

Age in years:
_years_between(current_date,[Date of Birth]) returns number of full years between the two dates

Age at time of graduation in years and fractional months:

_months_between ([OUTCOME_GRADUATION_DATE],[BIRTH_DATE])/12 returns

number of full years and fractional months (ex: 21.4) as of the date of graduation

Previous month:
extract(month, _add_months(current_date, -1))

Add/subtract months: 

'20' || substrb(to_char(_add_months([Time stamp],-24)),8,2) 

– This will subtract 24 months from the Time stamp month and display the resulting

year.

TRUNC (supplied by H. Cleveland)

TRUNC(date, [format])

Where [format] is optional and can be any of the following:

Year             SYYYY, YYYY, YEAR, SYEAR, YYY, YY, Y

ISO Year      IYYY, IY, I

Quarter         Q

Month           MONTH, MON, MM, RM

Week            WW

IW                IW

W                 W

Day              DDD, DD, J

Start day of the week      DAY, DY, D

Hour             HH, HH12, HH24

Minute          MI

Examples:

Functions	Sytax
Start of today	trunc({sysdate})
Start of yesterday	(trunc(_add_days({sysdate}, -1),'dd'))
Start of Current Month	trunc({sysdate},'mm')
End of Current Month	last_day({sysdate})
Start of Previous Month	trunc((trunc({sysdate},'mm')-1),'mm')
End of Previous Month	trunc({sysdate},'mm')-1
Start of Current Quarter	trunc({sysdate},'q')
End of Current Quarter	add_months(trunc({sysdate},'q'),3)-1
Start of Previous Quarter	trunc(trunc({sysdate},'q')-1,'q')
End of Previous Quarter	trunc({sysdate},'q')-1
Start of Current Year	trunc({sysdate},'y')
End of Current Year	add_months(trunc({sysdate},'y'),12)-1
Start of Previous Year	trunc(trunc({sysdate},'y')-1,'y')
End of Previous Year	trunc({sysdate},'y')-1  When [TIME STAMP] = Aug 3, 2010 5:05:45 PM
Start of day in [TIME STAMP]	trunc(_add_days([TIME STAMP], 0),'dd') = Aug 3, 2010 12:00:00 AM
Start of day previous to day in [TIME STAMP]	trunc(_add_days([TIME STAMP],-1),'dd') = Aug 2, 2010 12:00:00 AM
Start of the hour in [TIME STAMP]	trunc([TIME STAMP], 'hh') = Aug 3, 2010 5:00:00 PM
All records that occurred yesterday	[TIME STAMP] between (trunc(_add_days({sysdate}, -1),'dd')) and (trunc({sysdate}))
Day of week for current date	_day_of_week(current_date , 1)
If it's Monday, include Decision Dates = Sat, Sun or Mon otherwise DECISION DATE = Current Date:	(((_day_of_week(current_date,1) = 1 ) AND ([Admission Application].[Admissions Application].[LATEST_DECISION_DATE] BETWEEN (current_date - 2) AND current_date)) OR ((_day_of_week(current_date,1) <> 1) AND ([Admission Application].[Admissions Application].[LATEST_DECISION_DATE] = current_date))) If it’s Monday, then include any record beginning with the start of Friday through the start of Monday, otherwise include any record beginning with the start of yesterday through
the start of Today:	((_day_of_week(current_date,1) = 1 ) AND ([Audit].[COGIPF_RUNREPORT].[TIME STAMP] BETWEEN (trunc(_add_days({sysdate}, -3),'dd')) AND (trunc({sysdate}))) OR ((_day_of_week(current_date,1) <> 1) AND ([Audit].[COGIPF_RUNREPORT].[TIME STAMP] BETWEEN (trunc(_add_days({sysdate}, -1),'dd')) AND (trunc({sysdate})))))

TRUNC (timestamp, [parts of timestamp])

Where [parts of timestamp] can be

'D'-- Return only day information in the timestamp. Hours, minutes, and seconds are

returned as zero.

'h'-- Return only day and hour information in the timestamp. Minutes and seconds are

returned as zero.

'm'-- Return only day, hour, and minute information in the timestamp. Seconds are

returned as zero.

's'-- Return only day, hour, and second information in the timestamp, but do not show

milliseconds.

TRUNC also can be used with decimal numbers to return a number rounded to a given number

of decimal places. 

For example:

TRUNC(1234.567) returns 1,234

TRUNC(1234.567, 1) returns 12,345.6

TRUNC(1234.567, -2) returns 1,200

How to handle date related relational and dimensional functions

Date related relational functions

Make timestamp from date key

Parameters map is a good solution to get current date; however, it present challenges to directly use date type, instead, data key as integer is easily to handle. In some cases, it is requested to turn it into real date in report. Code below can help
 
_make_timestamp (  
cast(#$CurrentDateKey{'Fact TableX'}#  /10000 ,integer),
cast(#$CurrentDateKey{'Fact TableX'}#  /100, integer) - ( cast(#$CurrentDateKey{'Fact TableX'}#  /10000, integer))*100,
#$CurrentDateKey{'Fact TableX'}# - cast((#$CurrentDateKey{'Fact TableX'}#  /100),integer)*100 )

Get last complete month date

Date + 1 Day - 1 Month, then get last day of month.

_last_of_month (_add_months (_add_days ([Fact].[Dim Time].[Current Date],1),-1))

Make week start day

For report with weeks, it is requested to display the first day of each week. The data item can get first day of each week.

case month(minimum([Dim Time].[Date] for [Dim Time].[Week Id]))
WHEN 1 THEN 'Jan'
WHEN 2 THEN 'Feb'
WHEN 3 THEN 'Mar'
WHEN 4 THEN 'Apr'
WHEN 5 THEN 'May'
WHEN 6 THEN 'Jun'
WHEN 7 THEN 'Jul'
WHEN 8 THEN 'Aug'
WHEN 9 THEN 'Sep'
WHEN 10 THEN 'Oct'
WHEN 11 THEN 'Nov'
WHEN 12 THEN 'Dec'
END
+
' ' + right('0' + cast(day(minimum([Dim Time].[Date] for [Dim Time].[Week Id])), varchar(2)), 2)

Half to date  current year, prior year

When it is requested to get Half to date, get reference date first as data item,  then get date started. CYTD- Current year to date; PYTD- Prior year to date; CHTD-Current half year to date; PHTD-Prior half year to date

[Dim Time].[Date] between  [DateFrom] and [DateTo]

[DateFrom]

case when ([Current Month Number] >6 ) and (?TimePeriodGrp?='CHTD' or ?TimePeriodGrp?='PHTD') then  _make_timestamp (year([DateTo]),07,01)

else  _make_timestamp (year([DateTo]),01,01)

End

[DateTo]

case

when (?TimePeriodGrp?='CYTD') then ([Dim Time (Activity)].[ Current Date])

when (?TimePeriodGrp?='PYTD') then ( _add_years ([Dim Time (Activity)].[ Current Date], -1))

End  

{ it also can be done by directly using filter
( ([Fact].[Dim Time].[Current Month Number] <7) and ([Fact].[Dim Time].[Year] = [Fact].[Dim Time].[Current Year] ) ) OR ( ([Fact].[Dim Time].[Current Month Number] >=7) and ([Fact].[Dim Time].[Year] = [Fact].[Dim Time].[Current Year] ) and [Fact].[Dim Time].[Month Number] >=7)
}

7d, MTD, YTD, PYTD  

case when ?Relative Date?='7d'
then ( [Date] between _add_days(2007-05-17,-7) and (2007-05-17))
when ?Relative Date? ='MTD'
then( [Date] between _first_of_month(2007-05-17) and (2007-05-17))
when ?Relative Date? ='YTD'
then( [Date] between _add_days(2007-05-17,((_day_of_year(2007-05-17)-1)*-1))
 and (2007-05-17))

Current YTD Sales:
if ( SalesDate between _make_timestamp(extract(year,current_date), 1, 1) and current_date )
then (SalesAmount)
else (0)

Prior YTD Sales:
if ( SalesDate between _make_timestamp((extract(year,current_date)-1), 1, 1) and _add_years(current_date,-1) )
then (SalesAmount)
else (0)

Get Last month of data available 

assume available date is [AvailableDate] and time dimension is [DimTime]: (year(_add_months (_add_days ([Namespace].[DimTime].[ AvailableDate],1),-1)) * 100) + month(_add_months (_add_days ([Namespace].[ DimTime].[ AvailableDate],1),-1))

Get start date and end date based on last available month

Get year start date

1)-_day_of_year ([End Date])
-366

2)_add_days ([End Date], -_day_of_year ([End Date])+1)
1-Jan-12 12:00:00 AM



Get last complete Month date

1)[Fact].[Dim Time].Current Date]
6-Jan-13 12:00:00 AM

2)_add_days ([Fact].[Dim Time].Current Date],1)
7-Jan-13 12:00:00 AM

3)_add_months (_add_days ([Fact].[Dim Time].Current Date],1),-1)
7-Dec-12 12:00:00 AM

4)_last_of_month (_add_months (_add_days ([Fact].[Dim Time].Current Date],1),-1))
31-Dec-12 12:00:00 AM

Get last 13 Months

[Fact Table].[Dim Time].[Month Id] >=
(year(_add_months (_add_days ([Fact Table].[Dim Time].[Current Date],1),-13)) * 100) +
month(_add_months (_add_days ([Fact Table].[Dim Time].[Current Date],1),-13))and 
[Fact Table].[Dim Time].[Month Id] <= 
(year(_add_months (_add_days ([Fact Table].[Dim Time].[Current Date],1),-1)) * 100) +
month(_add_months (_add_days ([Fact Table].[Dim Time].[Current Date],1),-1))

Show date in crosstab

cast(cast (extract (year,[Returned items (query)].[Time dimension].[Date]), Char
(4))+substring (cast(cast(_round (((extract (month,[Returned items (query)].[Time
dimension].[Date])/100)+1)*100,0),integer),Char(3)),2,2)+substring (cast(cast
(_round (((extract (day,[Returned items (query)].[Time dimension].[Date])/100)+1)
*100,0),integer),Char(3)),2,2),integer)

string2date (
substring (number2string ([Query1].[Date]),1,4)
+'-'+
substring (number2string ([Query1].[Date]),5,2)
+'-'+
substring (number2string ([Query1].[Date]),7,2)
)

For IBM DB2 the calculation should look like this:

cast_integer(cast_char (Year([Returned items (query)].[Time dimension].[Date]) ,4)

||

right( replace ('0'||cast_char (Month([Returned items (query)].[Time dimension].

[Date]) ,2),' ',''),2)

||

right(replace ('0'||cast_char (day([Returned items (query)].[Time dimension].[Date]) ,

2),' ',''),2))

For Microsoft SQLServer the calculation should look like this:

cast_integer(convert({varchar},[Returned items (query)].[Time dimension].[Date],112))

For Oracle:

to_number(To_Char([Returned items (query)].[Time dimension].[Date], 'YYYYMMDD'))

Useful links

Cognos Time and Date Functions  from temple university

Find Current Period using closingPeriod Function

closingPeriod ([sales_and_marketing_cs].[Time].[Time].[Month])

Find Current Period by Filtering on Measure Data

item(tail(filter(members([sales_and_marketing].[Time].[Time].[Month]),  tuple([Revenue], currentMember([sales_and_marketing].[Time].[Time]))  is not null), 1), 0)

Check link for detail explanation http://www.ibm.com/developerworks/data/library/cognos/reporting/dimensional_queries/page561.html

Current Month/Quarter/YTD/ Trailing Twelve Months

Often use a “base” month current period to build everything else off of:
 [Month Current] =  closingPeriod( [goc].[Years].[Years].[Month] )

Quarter
parent( [Month Current] )

YTD
total( currentMeasure within set
periodsToDate( [goc].[Years].[Years].[Year], [Month Current]  )  )

Trailing Twelve Months
total( currentMeasure within set
lastPeriods( 12, [Month Current]  )  )

Month % Change Prior Year
( [Month Current] - [Month Prior Year] ) / [Month Prior Year]
Where [Month Prior Year]  = lag( [Month Current] , 12  )

Note: currentMeasure is in the context of the crosstab

Period to date

[monthClosingPeriod] =
closingPeriod( [GOC].[Years].[Years].[Month] )

[periodsToDateForClosingPeriodMonth] =
PeriodsToDate( [GOC].[Years].[Years].[Year] ,   [monthClosingPeriod] )

Show real date from power cube

how to turn current day to real date, but dynamically displayed.


Current Day_Date
descendants ([Current Day],1)

Yesterday_Date
descendants ([Yesterday],1)

Useful links

Using the periodsToDate function within IBM Cognos 10 Report Studio to Calculate an OLAP Running-Total

IBM Cognos 8 Framework Manager - Dimensional Modeling for Time Period Analysis

Oracle date functions

Get the last day of the week select trunc(sysdate, 'DAY')+6 from dual;

Get first day of year SELECT TRUNC(TO_DATE('17-DEC-2001'),'YEAR') "First Day" FROM Dual; Get last Day of Current Month
SELECT add_months(trunc(sysdate) - (to_number(to_char(sysdate,'DD')) - 1), 1) -1 FROM dual

SQL server date functions

Get the first day of month DATEADD(dd,-(DAY(DT.DAY_DT)-1),DT.DAY_DT) Get date key select cast(convert(varchar(8), getdate(), 112) as integer) Get last Sunday
Select cast(convert(varchar(8), dateadd(day,-datepart(weekday,dateadd(WEEK,-1,GETDATE()))+1,dateadd(WEEK,-1,GETDATE())), 112) as integer)

Useful Query items

1. Get total reminding to go for product Category XYZ, set 0 if the reminding to go as 0

if (([Product Category] = 'XYZ') and (total ([Forecast] for [Province Id], [Product Category] ) - total([Sales] for [Province Id], [Product Category]) > 0)) then ( total ([Forecast] for [Province Id], [Product Category] ) - total([Sales] for [Province Id], [Product Category] )) else (0)


2. TYD, QTD and HTD based day ( Assume [Fact Current Date],[Fact Current Quarter Number] and [Fact Current Quarter Number] )
#/* YTD at the begining of year*/#
_add_days ([End Date], -_day_of_year ([Fact Table].[Dim Time].[Fact Current Date])+1)

#/* QTD */#
if ([Fact Table].[Dim Time].[Quarter Id] = [Fact Table].[Dim Time].[Fact Current Year]*10+[Fact Table].[Dim Time].[Fact Current Quarter Number])
then ([Fact Table].[Fact Table].[Measure]) 
else (0)

#/* HTD */#
If ( [Fact Table].[Dim Time].[Fact Current Quarter Number] > 2 ) Then
    ( If ( [Fact Table].[Dim Time].[Quarter Number] > 2) Then
( If  ([Fact Table].[Dim Time].[Quarter Id] <= [Fact Table].[Dim Time].[Fact Current Year]*10+[Fact Table].[Dim Time].[Fact Current Quarter Number])
   Then [Fact Table].[Fact Table].[Measure])
   else (0) )
      Else ( 0)  )
Else    ( 
      If ([Fact Table].[Dim Time].[Quarter Id]<=[Fact Table].[Dim Time].[Fact Current Year]*10+[Fact Table].[Dim Time].[Fact Current Quarter Number])
      then ([Fact Table].[Fact Table].[Measure])
      else (0) )

Time filter

filter(
[Time Dimension].[Time Hierarchy].[Date],
roleValue('_businessKey', currentMember([Time Dimension].[Time Hierarchy])) >= #sq(prompt('From', 'Date'))# and 
roleValue('_businessKey', currentMember([Time Dimension].[Time Hierarchy])) <= #sq(prompt('To', 'Date'))#
)

Identifying nth Weekday of a month in reports

Requirement: Identify the 2nd Thursday of the current month. Solution: Create data items ToDate, 1stDateofMonth, 1stDayofMonth, Nth, Day , AddDays, NthDay ToDate - current_date 1stDateofMonth - _first_of_month(ToDate) 1stDayofMonth - _day_of_week(1stDateofMonth ,1) // Assuming Monday is Day 1 Nth - 2 // The nth value of the weekday required, in our case we require 2nd Thursday Day - 4 // Assuming Monday is Day 1, then Thursday is Day 4 AddDays - case when [Day] >= [1stDayofMonth] then [Day] - [1stDayofMonth] else ([Day] + [1stDayofMonth]) -1 end NthDay - _add_days([1stDateofMonth],(([Nth]-1) * 7 ) + [AddDay]) NthDay returns the 2nd Thursday of the month.

Age calculation

We have two ways to calculate age in years and age in yy years mm months and dd days format

Calculate Age in years...

Create a query Calculation as below...

_years_between (current_date, [Birth date column])

Calculate Age in yy years, mm months and dd days format...

(replace [Birth Date] with your own Data of birth column)

substring (cast(_ymdint_between  (current_date, [Birth date]),char(6)),1,2) || ' Years '||

substring (cast(_ymdint_between  (current_date, [Birth date]),char(6)),3,2)

|| ' months ' ||

substring (cast(_ymdint_between  (current_date, [Birth date]),char(6)),5,2)

|| ' Days '