Interval refers to Date Interval Functions :
lastMonth(year,month)
lastQuarter(year,quarter)
lastYear(year)
thisMonth(year,month)
thisYear(year)
thisQuarter(year,quarter)
lastFisMonth(year,month)
lastFisQuarter(year,quarter)
lastFisYear(year)
thisFisMonth(year,month)
thisFisYear(year)
thisFisQuarter(year,quarter)
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