进一步发展：下面的代码满足了之前评论中想要的内容[如果你关注历史]:)，我下面的新问题让我很困惑。
问题：我想每周日进行“Week_Of_Year”调整，下面的代码每周一进行调整。我尝试了 1 和 0，但通过每个 Snowflake 的更改会话但没有运气！知道如何在星期天而不是星期一触发新的一周（因为这是目前的情况）？
即我想要的结果是 Date:1/2/2005 将 Week_Of_Year 反映为 2 ，而不是 1. alter session set week_of_year_policy = 1; vs 更改会话设置 week_of_year_policy = 0;
工作代码
create or replace temporary table test_temptable
(
DATE_ID SMALLINT NOT NULL
,FULL_DATE DATE NOT NULL
,DATE Varchar(10) NOT NULL
,YEAR SMALLINT NOT NULL
,WEEK_OF_YEAR SMALLINT NOT NULL
,DAY_OF_YEAR SMALLINT NOT NULL
,QTR_NUMBER SMALLINT NOT NULL
,DAY_OF_QUARTER SMALLINT NOT NULL
,MONTH_OF_YEAR SMALLINT NOT NULL
,MONTH_NAME CHAR(3) NOT NULL --need to have full month name, if it comes to it maybe do if logic
,DAY_OF_MONTH SMALLINT NOT NULL
,DAY_OF_WEEK VARCHAR(9) NOT NULL
,DAY_NAME VARCHAR(12) NOT NULL
,DAY_IS_WEEKDAY boolean NOT Null
,DAY_IS_LAST_OF_MONTH boolean NOT Null
,DAY_OF_WEEK_IN_MONTH SMALLINT NOT NULL
,HOLIDAYUSA VARCHAR(80) ----left out NOT NULL on Purpose
--- ,DAY_IS_HOLIDAY boolean NOT NULL
)
AS
WITH MY_DATES AS (
SELECT DATEADD(DAY, SEQ4(), '2005-01-01') AS Full_DATE
,(seq8()+ 1) AS date_id
,DATE_TRUNC('QUARTER',Full_DATE) as Q
,DATEDIFF('day',Q, Full_DATE) as Day_of_Quarter
/*logic to support Easter Day calculation */
,Full_DATE as SinCurDay
,MONTH(Full_Date) as inCurMonth
,YEAR(Full_Date) as inCurYear
,FLOOR(inCurYear/100) as inCurCent
,inCurYear%19 as inYear
,FLOOR((inCurCent-17)/25) as inYearTmp
,(inCurCent-FLOOR(inCurCent/4)-FLOOR((inCurCent-inYearTmp)/3)+(19*inYear)+15)%30 as inTemp2a
,inTemp2a-FLOOR(inTemp2a/28)*(1 - FLOOR(inTemp2a/28)*FLOOR(29/(inTemp2a+1))*FLOOR((21-inYear)/11)) as inTemp2b
,(inCurYear+FLOOR(inCurYear/4)+inTemp2b+2-inCurCent+FLOOR(inCurCent/4))%7 as inTemp3
,inTemp2b-inTemp3 as inTemp4
,3+FLOOR((inTemp4+40)/44) as inEastMontha
,inTemp4+28-31*FLOOR(inEastMontha/4) as inEastDay
,inEastMontha /*- 1*/ as inEastMonthb
,Date_from_parts(inCurYear,inEastMonthb, inEastDay) as EasterDay
/*End Easter Day Logic */
/*Day of Week in Month*/
/* CASE
WHEN Day(Full_Date) < 8 THEN 1
WHEN Day(Full_Date) BETWEEN 7 AND 14 then 2
WHEN Day(Full_Date) BETWEEN 14 AND 21 then 3
WHEN Day(Full_Date) BETWEEN 21 AND 28 then 4
ELSE 5 End as Day_In_Month
*/
FROM TABLE(GENERATOR(ROWCOUNT=>365))
)
SELECT date_id
,Full_Date
,to_varchar(Full_Date, 'mm/dd/yyyy')
,YEAR(Full_Date)
,WEEKOFYEAR(Full_Date)
,DAYOFYEAR(Full_Date)
,QUARTER(Full_Date)
,Day_Of_Quarter + 1
,MONTH(Full_Date)
,MONTHNAME(Full_Date)
,DAY(Full_Date)
,DAYOFWEEK(Full_Date) + 1
,DAYNAME(Full_Date)
/*Weekend boolean */
,CASE
WHEN DAYOFWEEK(Full_date) + 1 = 7 THEN FALSE
WHEN DAYOFWEEK(Full_date) + 1 = 1 THEN FALSE
ELSE TRUE END
/*Last Day Of Month Boolean*/
,CASE
WHEN Full_Date = last_day(Full_Date) THEN True
ELSE FALSE END
/*Week in Month*/
---,CAST(Round((day(Full_Date) +6)/7,0) as VARCHAR)
,CASE
WHEN Day(Full_Date) < 8 THEN 1
WHEN Day(Full_Date) BETWEEN 7 AND 14 then 2
WHEN Day(Full_Date) BETWEEN 14 AND 21 then 3
WHEN Day(Full_Date) BETWEEN 21 AND 28 then 4
ELSE 5 End
/*HolidayUSA Logic */
,CASE
WHEN MONTH(Full_Date) = 10 AND DAY(Full_Date) = 31 THEN 'Halloween'
/*ThanksGiving*/
WHEN MONTH(Full_Date) = 11 AND DAYOFWEEK(Full_Date) + 1 = 5 AND
CASE
WHEN Day(Full_Date) < 8 THEN 1
WHEN Day(Full_Date) BETWEEN 7 AND 14 then 2
WHEN Day(Full_Date) BETWEEN 14 AND 21 then 3
WHEN Day(Full_Date) BETWEEN 21 AND 28 then 4
ELSE 5 End = 4
THEN 'Thanksgiving Day' -- should I add ()
WHEN MONTH(Full_Date) = 11 AND DAYOFWEEK(Full_Date) + 1 = 6 AND
CASE
WHEN Day(Full_Date) < 8 THEN 1
WHEN Day(Full_Date) BETWEEN 7 AND 14 then 2
WHEN Day(Full_Date) BETWEEN 14 AND 21 then 3
WHEN Day(Full_Date) BETWEEN 21 AND 28 then 4
ELSE 5 End = 4
THEN 'Black Friday' -- should I add ()
WHEN MONTH(Full_Date) = 12 AND DAY(Full_Date) = 25 THEN 'Christmas Day'
WHEN MONTH(Full_Date) = 7 AND DAY(Full_Date) = 4 THEN 'Independence Day'
WHEN MONTH(Full_Date) = 12 AND DAY(Full_Date) = 31 THEN 'New Years Eve'
WHEN MONTH(Full_Date) = 1 AND DAY(Full_Date) = 1 THEN 'New Years Day'
WHEN MONTH(Full_Date) = 5 AND DAYOFWEEK(Full_Date)+ 1 = 2 AND Day(Full_Date) > '24' then 'Memorial Day'
WHEN MONTH(Full_Date) = 9 AND DAYOFWEEK(Full_Date) + 1 = 2 AND Day(Full_Date) < '8'THEN 'Labor Day'
/*Martin Luther King Jr Day */
WHEN MONTH(Full_Date) = 1 AND DAYOFWEEK(Full_Date) + 1 = 2 AND
CASE
WHEN Day(Full_Date) < 8 THEN 1
WHEN Day(Full_Date) BETWEEN 7 AND 14 then 2
WHEN Day(Full_Date) BETWEEN 14 AND 21 then 3
WHEN Day(Full_Date) BETWEEN 21 AND 28 then 4
ELSE 5 End
= 3 THEN 'Martin Luther King Jr Day'
/*Presidents Day*/
WHEN MONTH(Full_Date) = 2 AND DAYOFWEEK(Full_Date) + 1 = 2 AND
CASE
WHEN Day(Full_Date) < 8 THEN 1
WHEN Day(Full_Date) BETWEEN 7 AND 14 then 2
WHEN Day(Full_Date) BETWEEN 14 AND 21 then 3
WHEN Day(Full_Date) BETWEEN 21 AND 28 then 4
ELSE 5 END
= 3 THEN 'Presidents Day'
WHEN MONTH(Full_Date) = 11 AND DAY(Full_Date) = 11 THEN 'Veterans Day'
/*Mothers Day */
WHEN MONTH(Full_Date) = 5 AND DAYOFWEEK(Full_Date) + 1 = 1 AND
CASE
WHEN Day(Full_Date) < 8 THEN 1
WHEN Day(Full_Date) BETWEEN 7 AND 14 then 2
WHEN Day(Full_Date) BETWEEN 14 AND 21 then 3
WHEN Day(Full_Date) BETWEEN 21 AND 28 then 4
ELSE 5 END
= 2 THEN 'Mothers Day'
/*Fathers Day */
WHEN MONTH(Full_Date) = 6 AND DAYOFWEEK(Full_Date) + 1 = 1 AND
CASE
WHEN Day(Full_Date) < 8 THEN 1
WHEN Day(Full_Date) BETWEEN 7 AND 14 then 2
WHEN Day(Full_Date) BETWEEN 14 AND 21 then 3
WHEN Day(Full_Date) BETWEEN 21 AND 28 then 4
ELSE 5 END
= 3 THEN 'Fathers Day'
WHEN MONTH(Full_Date) = 2 AND DAY(Full_Date) = 14 THEN 'Valentines Day'
WHEN Full_Date = EasterDay THEN 'Easter Day'
WHEN Full_Date = EasterDay - 2 THEN 'Good Friday'
ELSE NULL END
--- ,CASE
--- WHEN HOLIDAYUSA is not NULL THEN TRUE Else False
--- END
FROM MY_DATES
Order By Full_Date;
进化的问题：请查看更新的代码，我将 T-SQL 逻辑转换为计算复活节到雪花可以理解的东西。唯一的问题是，对于 2005 年，我休息了一天（下面的代码返回 2005 年 3 月 28 日复活节，但它是 2008 年 3 月 27 日）。
问题：有人可以帮助我理解为什么下面的行如此接近但错误，我已经尝试了很多 rtrim、RIGHT 和其他对值的操作，这些值认为它与四舍五入有关，但是所有的返回复活节的日期更远。以下是我最近 20 年的跨度，都在实际的 1-5 天内。
导致错误的行：date_from_parts(YR, '0' + rtrim(EasterMonth),'0' + rtrim(EasterDay)) AS test6
复活节逻辑
(24 + 19 * (YR % 19)) % 30 AS EpactCalc,
EpactCalc - (EpactCalc / 28) AS PaschalDaysCalc,
PaschalDaysCalc - ((YR + YR / 4 + PaschalDaysCalc - 13) % 7) AS NumOfDaysToSunday,
3 + (NumOfDaysToSunday + 40) / 44 AS EasterMonth,
NumOfDaysToSunday + 28 - (31 * (EasterMonth / 4)) AS EasterDay, ---EasterMonth + RTRIM(YR) as test6
---to_date_from_parts(YR,(("0" + EasterMonth).substr(-2)), (("0" + EasterDay).substr(-2)) as test6
date_from_parts(YR, '0' + rtrim(EasterMonth),'0' + rtrim(EasterDay)) AS test6
完整脚本：
CREATE OR REPLACE
TEMPORARY TABLE .test_temptable (Date_Id SMALLINT NOT NULL ,Full_Date DATE NOT NULL ,Date Varchar(10) NOT NULL ,YEAR SMALLINT NOT NULL ,WEEK_OF_YEAR SMALLINT NOT NULL ,DAY_OF_YEAR SMALLINT NOT NULL ,QTR_Number SMALLINT NOT NULL ,Day_Of_Quarter SMALLINT NOT NULL,MONTH_OF_YEAR SMALLINT NOT NULL ,MONTH_NAME CHAR(3) NOT NULL --need to have full month name, if it comes to it maybe do if logic
,DAY_OF_MONTH SMALLINT NOT NULL ,DAY_OF_WEEK VARCHAR(9) NOT NULL ,DAY_NAME VARCHAR(12) NOT NULL ,DAY_IS_WEEKDAY boolean NOT NULL,DAY_IS_LAST_OF_MONTH boolean NOT NULL ,DAY_OF_WEEK_IN_MONTH SMALLINT NOT NULL ,HOLIDAYUSA VARCHAR(80) ----left out NOT NULL on Purpose
,test1 smallint NOT NULL,test2 smallint NOT NULL ,test3 smallint NOT NULL ,test4 smallint NOT NULL,test5 smallint NOT NULL ,test6 DATE NOT NULL) AS WITH CTE_MY_DATE AS
(---Returns a sequence of monotonically increasing integers, with wrap-around. Wrap-around occurs after the largest representable integer of the integer width (1, 2, 4, or 8 byte)..??I'd like to understand this a tad bit better.Is SEQ4 for float?
SELECT DATEADD(DAY, SEQ4(), '2005-01-01') AS Full_DATE,
YEAR(Full_Date) AS YR,
(seq8()+ 1) AS date_id,
DATE_TRUNC('QUARTER',Full_DATE) AS q,
DATEDIFF('day',q, Full_DATE) AS Day_of_Quarter,
(24 + 19 * (YR % 19)) % 30 AS EpactCalc,
EpactCalc - (EpactCalc / 28) AS PaschalDaysCalc,
PaschalDaysCalc - ((YR + YR / 4 + PaschalDaysCalc - 13) % 7) AS NumOfDaysToSunday,
3 + (NumOfDaysToSunday + 40) / 44 AS EasterMonth,
NumOfDaysToSunday + 28 - (31 * (EasterMonth / 4)) AS EasterDay, ---EasterMonth + RTRIM(YR) as test6
---to_date_from_parts(YR,(("0" + EasterMonth).substr(-2)), (("0" + EasterDay).substr(-2)) as test6
date_from_parts(YR, '0' + rtrim(EasterMonth),'0' + rtrim(EasterDay)) AS test6
FROM TABLE(GENERATOR(ROWCOUNT=>9125))
)
SELECT date_id ,
Full_Date ,
to_varchar(Full_Date, 'mm/dd/yyyy') ,
YEAR(Full_Date) ,
WEEKOFYEAR(Full_Date) ,
DAYOFYEAR(Full_Date) ,
QUARTER(Full_Date) ,
Day_Of_Quarter + 1 ,
MONTH(Full_Date) ,
MONTHNAME(Full_Date) ,
DAY(Full_Date) ,
DAYOFWEEK(Full_Date) + 1 ,
DAYNAME(Full_Date) ---calculates if it is on weekend or not
,
CASE
WHEN DAYOFWEEK(Full_date) = 7 THEN FALSE
WHEN DAYOFWEEK(Full_date) = 1 THEN FALSE
ELSE TRUE
END ----calculates if last day of month
,
CASE
WHEN Full_Date = last_day(Full_Date) THEN TRUE
ELSE FALSE
END,
CAST(Round((day(Full_Date) +6)/7,0) AS VARCHAR) -- this is what week you are in in the month, double check that what it ought to be
--- calculates holidays, is Thxgiving always in the fifth week?,
,
CASE
WHEN MONTH(Full_Date) = 10
AND DAY(Full_Date) = 31 THEN 'Halloween'
WHEN MONTH(Full_Date) = 11
AND DAYOFWEEK(Full_Date) + 1 = 4
AND CAST(Round((day(Full_Date) +6)/7,0) AS VARCHAR) = 5 THEN 'Thanksgiving Day'
WHEN MONTH(Full_Date) = 12
AND DAY(Full_Date) = 25 THEN 'Christmas Day'
WHEN MONTH(Full_Date) = 7
AND DAY(Full_Date) = 4 THEN 'Independence Day' --adding
WHEN MONTH(Full_Date) = 12
AND DAY(Full_Date) = 31 THEN 'New Years Eve'
WHEN MONTH(Full_Date) = 1
AND DAY(Full_Date) = 1 THEN 'New Years Day' ---memorial day attempt
WHEN MONTH(Full_Date) = 5
AND DAYOFWEEK(Full_Date)+ 1 = 2
AND Day(Full_Date) > '24' THEN 'Memorial Day' ---labor day
WHEN MONTH(Full_Date) = 9
AND DAYOFWEEK(Full_Date) + 1 = 2
AND Day(Full_Date) < '8'THEN 'Labor Day'
WHEN MONTH(Full_Date) = 1
AND DAYOFWEEK(Full_Date) = 2
AND CAST(Round((day(Full_Date) +6)/7,0) AS VARCHAR) = 3 THEN 'Martin Luther King Jr Day'
WHEN MONTH(Full_Date) = 2
AND DAYOFWEEK(Full_Date) = 2
AND CAST(Round((day(Full_Date) +6)/7,0) AS VARCHAR) = 3 THEN 'Presidents Day'
WHEN MONTH(Full_Date) = 11
AND DAY(Full_Date) = 11 THEN 'Veterans Day' ---added Mother's Day
WHEN MONTH(Full_Date) = 5
AND DAYOFWEEK(Full_Date) + 1 = 1
AND CAST(Round((day(Full_Date) +6)/7,0) AS VARCHAR) = 2 THEN 'Mothers Day'
WHEN MONTH(Full_Date) = 6
AND DAYOFWEEK(Full_Date) + 1 = 1
AND CAST(Round((day(Full_Date) +6)/7,0) AS VARCHAR) = 3 THEN 'Fathers Day'
WHEN MONTH(Full_Date) = 2
AND DAY(Full_Date) = 14 THEN 'Valentines Day' ---easter
---good friday
ELSE NULL
END ,
EpactCalc ,
PaschalDaysCalc ,
NumOfDaysToSunday ,
EasterMonth ,
EasterDay ,
test6
FROM CTE_MY_DATE;
老问题： 我为雪花用户准备了一段不错的代码，我需要一些帮助来完成。我特别想使用为 SqlServer 编写的第二块代码用于 Snowflakes env，并集成到下面的脚本中（第一块代码）。
具体来说：a）“如何将函数集成到这样的查询中”，如建议将代码放在上面我的脚本中的位置，因为我无法理解如何在 select 语句中集成函数 b）“有什么很明显这个查询会使在雪花中运行它变得非常困难”我试图在雪花中单独运行 SQLServer“复活节日期”代码，并更改了变量以匹配雪花要求（即取出 @），然后我得到了一个错误 unexpected 'BEGIN'。
CREATE OR REPLACE
TEMPORARY TABLE test_temptable (Date_Id SMALLINT NOT NULL ,Full_Date DATE NOT NULL ,Date Varchar(10) NOT NULL ,YEAR SMALLINT NOT NULL ,WEEK_OF_YEAR SMALLINT NOT NULL ,DAY_OF_YEAR SMALLINT NOT NULL ,QTR_Number SMALLINT NOT NULL ,Day_Of_Quarter SMALLINT NOT NULL,MONTH_OF_YEAR SMALLINT NOT NULL ,MONTH_NAME CHAR(3) NOT NULL
,DAY_OF_MONTH SMALLINT NOT NULL ,DAY_OF_WEEK VARCHAR(9) NOT NULL ,DAY_NAME VARCHAR(12) NOT NULL ,DAY_IS_WEEKDAY boolean NOT NULL,DAY_IS_LAST_OF_MONTH boolean NOT NULL ,DAY_OF_WEEK_IN_MONTH SMALLINT NOT NULL ,HOLIDAYUSA VARCHAR(80)
(
SELECT DATEADD(DAY, SEQ4(), '2005-01-01') AS Full_DATE,
(seq8()+ 1) AS date_id,
DATE_TRUNC('QUARTER',Full_DATE) AS q,
DATEDIFF('day',q, Full_DATE) AS Day_of_Quarter
FROM TABLE(GENERATOR(ROWCOUNT=>366))
)
SELECT date_id ,
Full_Date ,
to_varchar(Full_Date, 'mm/dd/yyyy') ,
YEAR(Full_Date) ,
WEEKOFYEAR(Full_Date) ,
DAYOFYEAR(Full_Date) ,
QUARTER(Full_Date) ,
Day_Of_Quarter + 1 ,
MONTH(Full_Date) ,
MONTHNAME(Full_Date) ,
DAY(Full_Date) ,
DAYOFWEEK(Full_Date) + 1 ,
DAYNAME(Full_Date)
,
CASE
WHEN DAYOFWEEK(Full_date) = 7 THEN FALSE
WHEN DAYOFWEEK(Full_date) = 1 THEN FALSE
ELSE TRUE
END
,
CASE
WHEN Full_Date = last_day(Full_Date) THEN TRUE
ELSE FALSE
END,
CAST(Round((day(Full_Date) +6)/7,0) AS VARCHAR)
,
CASE
WHEN MONTH(Full_Date) = 10
AND DAY(Full_Date) = 31 THEN 'Halloween'
WHEN MONTH(Full_Date) = 11
AND DAYOFWEEK(Full_Date) + 1 = 4
AND CAST(Round((day(Full_Date) +6)/7,0) AS VARCHAR) = 5 THEN 'Thanksgiving Day'
WHEN MONTH(Full_Date) = 12
AND DAY(Full_Date) = 25 THEN 'Christmas Day'
WHEN MONTH(Full_Date) = 7
AND DAY(Full_Date) = 4 THEN 'Independence Day' --adding
WHEN MONTH(Full_Date) = 12
AND DAY(Full_Date) = 31 THEN 'New Years Eve'
WHEN MONTH(Full_Date) = 1
AND DAY(Full_Date) = 1 THEN 'New Years Day' ---memorial day attempt
WHEN MONTH(Full_Date) = 5
AND DAYOFWEEK(Full_Date)+ 1 = 2
AND Day(Full_Date) > '24' THEN 'Memorial Day' ---labor day
WHEN MONTH(Full_Date) = 9
AND DAYOFWEEK(Full_Date) + 1 = 2
AND Day(Full_Date) < '8'THEN 'Labor Day'
WHEN MONTH(Full_Date) = 1
AND DAYOFWEEK(Full_Date) = 2
AND CAST(Round((day(Full_Date) +6)/7,0) AS VARCHAR) = 3 THEN 'Martin Luther King Jr Day'
WHEN MONTH(Full_Date) = 2
AND DAYOFWEEK(Full_Date) = 2
AND CAST(Round((day(Full_Date) +6)/7,0) AS VARCHAR) = 3 THEN 'Presidents Day'
WHEN MONTH(Full_Date) = 11
AND DAY(Full_Date) = 11 THEN 'Veterans Day' ---added Mother's Day
WHEN MONTH(Full_Date) = 5
AND DAYOFWEEK(Full_Date) + 1 = 1
AND CAST(Round((day(Full_Date) +6)/7,0) AS VARCHAR) = 2 THEN 'Mothers Day'
WHEN MONTH(Full_Date) = 6
AND DAYOFWEEK(Full_Date) + 1 = 1
AND CAST(Round((day(Full_Date) +6)/7,0) AS VARCHAR) = 3 THEN 'Fathers Day'
WHEN MONTH(Full_Date) = 2
AND DAY(Full_Date) = 14 THEN 'Valentines Day' ---easter
---good friday
ELSE NULL
END
FROM CTE_MY_DATE;
下面是我需要帮助才能输入上述内容的 SQLServer 代码！！（感谢函数返回给定年份的复活节日期）
CREATE FUNCTION dbo.GetEasterSunday
( @Y INT )
RETURNS SMALLDATETIME
AS
BEGIN
DECLARE @EpactCalc INT,
@PaschalDaysCalc INT,
@NumOfDaysToSunday INT,
@EasterMonth INT,
@EasterDay INT
SET @EpactCalc = (24 + 19 * (@Y % 19)) % 30
SET @PaschalDaysCalc = @EpactCalc - (@EpactCalc / 28)
SET @NumOfDaysToSunday = @PaschalDaysCalc - (
(@Y + @Y / 4 + @PaschalDaysCalc - 13) % 7
)
SET @EasterMonth = 3 + (@NumOfDaysToSunday + 40) / 44
SET @EasterDay = @NumOfDaysToSunday + 28 - (
31 * (@EasterMonth / 4)
)
RETURN
(
SELECT CONVERT
( SMALLDATETIME,
RTRIM(@Y)
+ RIGHT('0'+RTRIM(@EasterMonth), 2)
+ RIGHT('0'+RTRIM(@EasterDay), 2)
)
)
END
GO