Current Date And Time Information

Riding MVJ's excellent F_TABLE_DATE function, I often use this view for current date and time information.SELECTCURRENT_TIMESTAMP AS Now,
DATEADD(MINUTE, DATEDIFF(MINUTE, 0.00069445, CURRENT_TIMESTAMP), 0) AS previousMinute,
DATEADD(MINUTE, DATEDIFF(MINUTE, 0, CURRENT_TIMESTAMP), 0) AS thisMinute,
DATEADD(MINUTE, DATEDIFF(MINUTE, 0, CURRENT_TIMESTAMP), 0.00069445) AS nextMinute,
DATEADD(HOUR, DATEDIFF(HOUR, 0.0416667, CURRENT_TIMESTAMP), 0) AS previousHour,
DATEADD(HOUR, DATEDIFF(HOUR, 0, CURRENT_TIMESTAMP), 0) AS thisHour,
DATEADD(HOUR, DATEDIFF(HOUR, 0, CURRENT_TIMESTAMP), 0.0416667) AS nextHour,
DATEADD(DAY, DATEDIFF(DAY, 1, CURRENT_TIMESTAMP), 0) AS previousDay,
DATEADD(DAY, DATEDIFF(DAY, 0, CURRENT_TIMESTAMP), 0) AS thisDay,
DATEADD(DAY, DATEDIFF(DAY, 0, CURRENT_TIMESTAMP), 1) AS nextDay,
DATEADD(WEEK, DATEDIFF(WEEK, 7, CURRENT_TIMESTAMP), 0) AS previousWeek,
DATEADD(WEEK, DATEDIFF(WEEK, 0, CURRENT_TIMESTAMP), 0) AS thisWeek,
DATEADD(WEEK, DATEDIFF(WEEK, 0, CURRENT_TIMESTAMP), 7) AS nextWeek,
DATEADD(MONTH, DATEDIFF(MONTH, 31, CURRENT_TIMESTAMP), 0) AS previousMonth,
DATEADD(MONTH, DATEDIFF(MONTH, 0, CURRENT_TIMESTAMP), 0) AS thisMonth,
DATEADD(MONTH, DATEDIFF(MONTH, -1, CURRENT_TIMESTAMP), 0) AS nextMonth,
DATEADD(QUARTER, DATEDIFF(QUARTER, 92, CURRENT_TIMESTAMP), 0) AS previousQuarter,
DATEADD(QUARTER, DATEDIFF(QUARTER, 0, CURRENT_TIMESTAMP), 0) AS thisQuarter,
DATEADD(QUARTER, DATEDIFF(QUARTER, -1, CURRENT_TIMESTAMP), 0) AS nextQuarter,
DATEADD(YEAR, DATEDIFF(YEAR, 365, CURRENT_TIMESTAMP), 0) AS previousYear,
DATEADD(YEAR, DATEDIFF(YEAR, 0, CURRENT_TIMESTAMP), 0) AS thisYear,
DATEADD(YEAR, DATEDIFF(YEAR, -1, CURRENT_TIMESTAMP), 0) AS nextYearFor example, If I want this weeks data I just join against this view and useWHEREDtCol >= thisWeek
AND DtCol < nextWeekOr previous months dataWHEREDtCol >= previousMonth
AND DtCol < thisMonth
EDIT: Faster week calculations.