从公历年和其他字段计算 ISO 年的逻辑

Question

如上所述，我需要从日历视图中计算 ISO 年份，我还在上面创建了一个视图来计算 ISO 周数，但我无法弄清楚计算 ISO 年的逻辑，有人可以尽快 post 它吗？

提前致谢。基绍尔

日历视图的结构

REPLACE VIEW Sys_Calendar.CALENDAR(

calendar_date, day_of_week, day_of_month, day_of_year, day_of_calendar, 周day_of_month, week_of_month, week_of_year, week_of_calendar, month_of_quarter, month_of_year, month_of_calendar, quarter_of_year, quarter_of_calendar, year_of_calendar) 作为选择 calendar_date, DayNumber_Of_Week(calendar_date), DayNumber_Of_Month(calendar_date), DayNumber_Of_Year(calendar_date), DayNumber_Of_Calendar(calendar_date), DayOccurrence_Of_Month(calendar_date), WeekNumber_Of_Month(calendar_date), WeekNumber_Of_Year(calendar_date), WeekNumber_Of_Calendar(calendar_date), MonthNumber_Of_Quarter(calendar_date), MonthNumber_Of_Year(calendar_date), month_of_calendar, QuarterNumber_Of_Year(calendar_date), quarter_of_calendar, YearNumber_Of_Calendar(calendar_date) 从 Sys_Calendar.CALENDARTMP;

Answer 1

如果您使用的是相当现代的 Teradata 版本，则可以使用 TD_SYSFNLIB.YEARNUMBER_OF_CALENDAR(calendar_date,'ISO')

如果我们以2014-12-31为例，它的ISO周是1。这个函数将对应return2015年作为它的ISO年

从公历年和其他字段计算 ISO 年的逻辑

logic for calculating ISO year from gregorian year and other fields

calendar

teradata