注意：这是加拿大假期：
我需要填写加拿大商务假期的表格 我有以下查询来设置商务假日日期，并且还考虑假日在下周末假期到下一个工作日的移动。即如果假日发生在星期日，那么星期一就成了假日。我还用工作日标识了一个标志，并添加了当天的英文描述。
我添加了一些计算列以使作业更容易，这些列在创建完所有数据后再次删除。我不能放弃桌子;该表可能部分填充，我无法覆盖现有数据。这是我问题的根源。因为＆＃39; Were＆＃39;查询非常慢。
我用来填充表的查询是：
DECLARE @StartDate DATE = '20000101'
,@EndDate DATE = '21631231';
WITH N10(n)
AS (SELECT 1
FROM ( VALUES ( 0), ( 1), ( 2), ( 3), ( 4), ( 5), ( 6), ( 7), ( 8), ( 9) ) v (n)),
N100(n)
AS (SELECT 1
FROM N10
,N10 n),
N10000(n)
AS (SELECT 1
FROM N100
,N100 n),
N100000(n)
AS (SELECT 1
FROM N10
,N10000 n),
N AS (SELECT TOP (DATEDIFF(DAY,@StartDate,@EndDate) + 1)
n = ROW_NUMBER() OVER (ORDER BY (SELECT NULL)) - 1
FROM N100000)
INSERT INTO [dbo].[BusinessCalendarDetails2] (BusinessDate,CreatedById,CreatedTime,BusinessCalendarId,IsWeekday,
IsHoliday)
(SELECT InsertDate,1,CURRENT_TIMESTAMP,1,1,0
FROM N
CROSS APPLY (SELECT DATEADD (DAY,n,@StartDate)) d (InsertDate)
WHERE NOT EXISTS ( SELECT 1 FROM [BusinessCalendarDetails2]
WHERE [BusinessDate] = InsertDate ));
这样可行，但问题是＆＃39; WHERE＆＃39;确定表中已存在的日期是否严重减慢（14分钟）。所以我想知道某人是否有更快的解决方案来识别已有的日期？
提前感谢您的协助。
以下是整个脚本，效果相当不错;其他人可能会发现它很有用。
-- Populate table with business holidays
-- If the table is missing add it
IF OBJECT_ID('BusinessCalendarDetails2') IS NULL
BEGIN
CREATE TABLE dbo.BusinessCalendarDetails2 (
Id BIGINT IDENTITY(1,1)
NOT NULL
,BusinessDate [DATE] NOT NULL
,Day AS DAY(BusinessDate)
,Week AS DATEPART(WEEK,BusinessDate)
,[Month] AS MONTH(BusinessDate)
,Quarter AS DATEPART(QUARTER,BusinessDate)
,[Year] AS YEAR(BusinessDate)
,DayOfWeek AS DATEPART(WEEKDAY,BusinessDate)
,CreatedById BIGINT NOT NULL
,CreatedTime DATETIMEOFFSET(7) NOT NULL
,UpdatedById BIGINT NULL
,UpdatedTime DATETIMEOFFSET(7) NULL
,BusinessCalendarId BIGINT NOT NULL
,RowVersion TIMESTAMP NOT NULL
,IsWeekday BIT NOT NULL
,IsHoliday BIT NOT NULL
,Description NVARCHAR(50)
,PRIMARY KEY CLUSTERED (Id ASC)
WITH (PAD_INDEX = OFF,STATISTICS_NORECOMPUTE = OFF,IGNORE_DUP_KEY = OFF,ALLOW_ROW_LOCKS = ON,
ALLOW_PAGE_LOCKS = ON) ON [PRIMARY])
ON [PRIMARY];
END;
-- Check if this col exists,
IF COL_LENGTH('dbo.BusinessCalendarDetails2','Day') IS NULL
BEGIN
ALTER TABLE dbo.BusinessCalendarDetails2
ADD -- Add calculated fields
Day AS DAY(BusinessDate), Week AS DATEPART(WEEK, BusinessDate), [Month] AS MONTH(BusinessDate), Quarter AS DATEPART(QUARTER, BusinessDate), [Year] AS YEAR(BusinessDate), DayOfWeek AS DATEPART(WEEKDAY, BusinessDate);
END;
GO
-- Date range to populate
DECLARE @StartDate DATE= '20000101' ,@EndDate DATE= '21631231';
WITH N10(n)
AS (SELECT 1
FROM ( VALUES ( 0 ), ( 1 ), ( 2 ), ( 3 ), ( 4 ), ( 5 ), ( 6 ), ( 7 ), ( 8 ), ( 9 ) ) AS v (n)),
N100(n)
AS (SELECT 1
FROM N10
,N10 AS n),
N10000(n)
AS (SELECT 1
FROM N100
,N100 AS n),
N100000(n)
AS (SELECT 1
FROM N10
,N10000 AS n),
N AS (SELECT TOP (DATEDIFF(DAY,@StartDate,@EndDate) + 1)
n = ROW_NUMBER() OVER (ORDER BY (SELECT NULL)) - 1
FROM N100000)
INSERT INTO dbo.BusinessCalendarDetails2 (BusinessDate,CreatedById,CreatedTime,BusinessCalendarId,IsWeekday,
IsHoliday)
(SELECT InsertDate,1,CURRENT_TIMESTAMP,1,1,0
FROM N
CROSS APPLY (SELECT DATEADD (DAY,n,@StartDate)) AS d (InsertDate)
WHERE NOT EXISTS ( SELECT 1
FROM BusinessCalendarDetails2
WHERE BusinessDate = InsertDate ));
-- Set Descriptions
UPDATE dbo.BusinessCalendarDetails2
SET Description = DATENAME(dw,BusinessDate)
FROM dbo.BusinessCalendarDetails2;
-- Set weekdays
UPDATE dbo.BusinessCalendarDetails2
SET IsWeekday = 0,Description = Description + ' Weekend'
FROM dbo.BusinessCalendarDetails2 AS c1
WHERE DATEPART(WEEKDAY,c1.BusinessDate) IN (1,7);
-- New Years Day
UPDATE dbo.BusinessCalendarDetails2
SET IsHoliday = 1,Description = Description + ' New Years Day'
FROM dbo.BusinessCalendarDetails2
WHERE BusinessCalendarDetails2.[Month] = 1
AND (SELECT CASE (@@DATEFIRST + DATEPART(DW,CAST(DATEPART(YEAR,BusinessDate) AS VARCHAR) + '-01-01')) % 7
WHEN 0 THEN 3 -- SAT
WHEN 1 THEN 2 -- Sunday
ELSE 1
END) = BusinessCalendarDetails2.Day;
-- Family Day Day -- 3rd Monday in February
UPDATE dbo.BusinessCalendarDetails2
SET IsHoliday = 1,Description = Description + ' Family Day'
FROM dbo.BusinessCalendarDetails2 AS c1
WHERE c1.[Month] = 2
AND c1.DayOfWeek = 2
AND c1.Day BETWEEN 15 AND 21;
-- Canada Day
UPDATE dbo.BusinessCalendarDetails2
SET IsHoliday = 1,Description = Description + ' Canada Day'
FROM dbo.BusinessCalendarDetails2
WHERE BusinessCalendarDetails2.[Month] = 7
AND (SELECT CASE (@@DATEFIRST + DATEPART(DW,CAST(DATEPART(YEAR,BusinessDate) AS VARCHAR) + '-07-01')) % 7
WHEN 0 THEN 3 -- SAT
WHEN 1 THEN 2 -- Sunday
ELSE 1
END) = BusinessCalendarDetails2.Day;
-- Civic Holiday
UPDATE dbo.BusinessCalendarDetails2
SET IsHoliday = 1,Description = Description + ' Civic Holiday'
FROM dbo.BusinessCalendarDetails2 AS c1
WHERE c1.[Month] = 8
AND c1.DayOfWeek = 2
AND c1.Day BETWEEN 1 AND 7;
-- Good Friday
UPDATE BusinessCalendarDetails2
SET IsHoliday = 1,Description = Description + ' Good Friday'
FROM dbo.BusinessCalendarDetails2 AS dimdate
CROSS APPLY (SELECT dimdate.Year AS y) _y
CROSS APPLY (SELECT y / 100 AS c,y - 19 * y / 19 AS n) _nc
CROSS APPLY (SELECT (c - 17) / 25 AS k) _k
CROSS APPLY (SELECT c - c / 4 - (c - k) / 3 + 19 * n + 15 AS i1) _i1
CROSS APPLY (SELECT i1 - 30 * i1 / 30 AS i2) _i2
CROSS APPLY (SELECT i2 - (i2 / 28) * (1 - (i2 / 28) * 29 / (i2 + 1) * (21 - n) / 11) AS i) _i
CROSS APPLY (SELECT y + y / 4 + i + 2 - c + c / 4 AS j1) _j1
CROSS APPLY (SELECT j1 - 7 * j1 / 7 AS j) _j
CROSS APPLY (SELECT i - j AS el) _el
CROSS APPLY (SELECT 3 + (el + 40) / 44 AS m) _m
CROSS APPLY (SELECT el + 28 - 31 * m / 4 AS d) _d
CROSS APPLY (SELECT DATEFROMPARTS (y,m,d) AS EasterSunday) _Easter
WHERE dimdate.BusinessDate = DATEADD(DAY,-2,EasterSunday);
-- Easter Sunday
UPDATE BusinessCalendarDetails2
SET IsHoliday = 0,Description = Description + ' Easter Sunday'
FROM dbo.BusinessCalendarDetails2 AS dimdate
CROSS APPLY (SELECT dimdate.Year AS y) _y
CROSS APPLY (SELECT y / 100 AS c,y - 19 * y / 19 AS n) _nc
CROSS APPLY (SELECT (c - 17) / 25 AS k) _k
CROSS APPLY (SELECT c - c / 4 - (c - k) / 3 + 19 * n + 15 AS i1) _i1
CROSS APPLY (SELECT i1 - 30 * i1 / 30 AS i2) _i2
CROSS APPLY (SELECT i2 - (i2 / 28) * (1 - (i2 / 28) * 29 / (i2 + 1) * (21 - n) / 11) AS i) _i
CROSS APPLY (SELECT y + y / 4 + i + 2 - c + c / 4 AS j1) _j1
CROSS APPLY (SELECT j1 - 7 * j1 / 7 AS j) _j
CROSS APPLY (SELECT i - j AS el) _el
CROSS APPLY (SELECT 3 + (el + 40) / 44 AS m) _m
CROSS APPLY (SELECT el + 28 - 31 * m / 4 AS d) _d
CROSS APPLY (SELECT DATEFROMPARTS (y,m,d) AS EasterSunday) _Easter
WHERE dimdate.BusinessDate = EasterSunday;
-- Labour Day -- first Monday of September
UPDATE dbo.BusinessCalendarDetails2
SET IsHoliday = 1,Description = Description + ' Labour Day'
FROM dbo.BusinessCalendarDetails2 AS c1
WHERE c1.[Month] = 9
AND c1.DayOfWeek = 2
AND c1.Day BETWEEN 1 AND 7;
-- Set Thanksgiving
UPDATE dbo.BusinessCalendarDetails2
SET IsHoliday = 1,Description = Description + ' Thanksgiving'
FROM dbo.BusinessCalendarDetails2 AS c1
WHERE c1.[Month] = 10
AND c1.DayOfWeek = 2
AND c1.Day BETWEEN 8 AND 14;
---- Christmas
UPDATE dbo.BusinessCalendarDetails2
SET IsHoliday = 1,Description = Description + ' Christmas Holidays'
FROM dbo.BusinessCalendarDetails2
WHERE [Month] = 12
AND Day BETWEEN 26 AND 28
AND (DATEPART(WEEKDAY,CAST(DATEPART(YEAR,BusinessDate) AS VARCHAR) + '-12-25') IN (1,7) -- Is Christmas on a weekend this year
OR DATEPART(WEEKDAY,CAST(DATEPART(YEAR,BusinessDate) AS VARCHAR) + '-12-26') IN (1,7)) -- Is Boxingday on a weekend this year
AND DATEPART(dw,BusinessDate) <> 4 -- NOT ON Wednesday!
AND DATEPART(DAY,(SELECT CASE (@@DATEFIRST + DATEPART(dw,BusinessDate)) % 7
WHEN 0 THEN DATEADD(DAY,2,BusinessDate) -- Saturday
WHEN 1 THEN DATEADD(DAY,1,BusinessDate) -- Sunday
ELSE BusinessDate
END AS Weekday)) BETWEEN 26
AND 28
OR [Month] = 12 -- Is christmas a week day?
AND Day BETWEEN 25 AND 26
AND IsWeekday = 1;
GO
-- Return table to orig state
ALTER TABLE dbo.BusinessCalendarDetails2 DROP COLUMN Day, Week, [Month], Quarter, [Year], DayOfWeek;
答案 0 :(得分：1)
如果BusinessDate上没有索引且表格足够大，那肯定会减慢速度。如果它已编制索引，您可能需要重建/重新组织它，甚至只需重做统计信息。
否则，根据您的磁盘，将不同的BusinessDate列值插入到带有索引的临时表中并将其与之进行比较可能会更快。
可能有很多事情。如果您还没有，那么您应该查看查询的ACTUAL执行计划和统计信息，以便更好地了解导致问题的原因。
答案 1 :(得分：0)
这是使用Temp表运行得更快的最终答案
-- Populate table with business holidays
CREATE TABLE #BusCalDet (
Id BIGINT IDENTITY(1,1)
NOT NULL
,BusinessDate [DATE] NOT NULL
,Day AS DAY(BusinessDate)
,Week AS DATEPART(WEEK,BusinessDate)
,[Month] AS MONTH(BusinessDate)
,Quarter AS DATEPART(QUARTER,BusinessDate)
,[Year] AS YEAR(BusinessDate)
,DayOfWeek AS DATEPART(WEEKDAY,BusinessDate)
,CreatedById BIGINT NOT NULL
,CreatedTime DATETIMEOFFSET(7) NOT NULL
,UpdatedById BIGINT NULL
,UpdatedTime DATETIMEOFFSET(7) NULL
,BusinessCalendarId BIGINT NOT NULL
,RowVersion TIMESTAMP NOT NULL
,IsWeekday BIT NOT NULL
,IsHoliday BIT NOT NULL
,Description NVARCHAR(50)
,PRIMARY KEY CLUSTERED (Id ASC)
WITH (PAD_INDEX = OFF,STATISTICS_NORECOMPUTE = OFF,IGNORE_DUP_KEY = OFF,ALLOW_ROW_LOCKS = ON,
ALLOW_PAGE_LOCKS = ON) ON [PRIMARY])
ON [PRIMARY];
-- Date range to populate
DECLARE @StartDate DATE= '20000101'
,@EndDate DATE= '21631231';
WITH N10(n)
AS (SELECT 1
FROM ( VALUES ( 0 ), ( 1 ), ( 2 ), ( 3 ), ( 4 ), ( 5 ), ( 6 ), ( 7 ), ( 8 ), ( 9 ) ) AS v (n)),
N100(n)
AS (SELECT 1
FROM N10
,N10 AS n),
N10000(n)
AS (SELECT 1
FROM N100
,N100 AS n),
N100000(n)
AS (SELECT 1
FROM N10
,N10000 AS n),
N AS (SELECT TOP (DATEDIFF(DAY,@StartDate,@EndDate) + 1)
n = ROW_NUMBER() OVER (ORDER BY (SELECT NULL)) - 1
FROM N100000)
INSERT INTO #BusCalDet (BusinessDate,CreatedById,CreatedTime,BusinessCalendarId,IsWeekday,IsHoliday)
SELECT InsertDate,1,CURRENT_TIMESTAMP,1,1,0
FROM N
CROSS APPLY (SELECT DATEADD (DAY,n,@StartDate)) AS d (InsertDate);
-- Set Descriptions
UPDATE #BusCalDet
SET Description = DATENAME(dw,BusinessDate)
FROM #BusCalDet;
-- Set weekdays
UPDATE #BusCalDet
SET IsWeekday = 0,Description = Description + ' Weekend'
FROM #BusCalDet AS c1
WHERE DATEPART(WEEKDAY,c1.BusinessDate) IN (1,7);
-- New Years Day
UPDATE #BusCalDet
SET IsHoliday = 1,Description = Description + ' New Years Day'
FROM #BusCalDet
WHERE #BusCalDet.[Month] = 1
AND (SELECT CASE (@@DATEFIRST + DATEPART(DW,CAST(DATEPART(YEAR,BusinessDate) AS VARCHAR) + '-01-01'))
% 7
WHEN 0 THEN 3 -- SAT
WHEN 1 THEN 2 -- Sunday
ELSE 1
END) = #BusCalDet.Day;
-- Family Day Day -- 3rd Monday in February
UPDATE #BusCalDet
SET IsHoliday = 1,Description = Description + ' Family Day'
FROM #BusCalDet AS c1
WHERE c1.[Month] = 2
AND c1.DayOfWeek = 2
AND c1.Day BETWEEN 15 AND 21;
-- Canada Day
UPDATE #BusCalDet
SET IsHoliday = 1,Description = Description + ' Canada Day'
FROM #BusCalDet
WHERE #BusCalDet.[Month] = 7
AND (SELECT CASE (@@DATEFIRST + DATEPART(DW,CAST(DATEPART(YEAR,BusinessDate) AS VARCHAR) + '-07-01'))
% 7
WHEN 0 THEN 3 -- SAT
WHEN 1 THEN 2 -- Sunday
ELSE 1
END) = #BusCalDet.Day;
-- Civic Holiday
UPDATE #BusCalDet
SET IsHoliday = 1,Description = Description + ' Civic Holiday'
FROM #BusCalDet AS c1
WHERE c1.[Month] = 8
AND c1.DayOfWeek = 2
AND c1.Day BETWEEN 1 AND 7;
-- Good Friday
UPDATE #BusCalDet
SET IsHoliday = 1,Description = Description + ' Good Friday'
FROM #BusCalDet AS dimdate
CROSS APPLY (SELECT dimdate.Year AS y) _y
CROSS APPLY (SELECT y / 100 AS c,y - 19 * y / 19 AS n) _nc
CROSS APPLY (SELECT (c - 17) / 25 AS k) _k
CROSS APPLY (SELECT c - c / 4 - (c - k) / 3 + 19 * n + 15 AS i1) _i1
CROSS APPLY (SELECT i1 - 30 * i1 / 30 AS i2) _i2
CROSS APPLY (SELECT i2 - (i2 / 28) * (1 - (i2 / 28) * 29 / (i2 + 1) * (21 - n) / 11) AS i) _i
CROSS APPLY (SELECT y + y / 4 + i + 2 - c + c / 4 AS j1) _j1
CROSS APPLY (SELECT j1 - 7 * j1 / 7 AS j) _j
CROSS APPLY (SELECT i - j AS el) _el
CROSS APPLY (SELECT 3 + (el + 40) / 44 AS m) _m
CROSS APPLY (SELECT el + 28 - 31 * m / 4 AS d) _d
CROSS APPLY (SELECT DATEFROMPARTS (y,m,d) AS EasterSunday) _Easter
WHERE dimdate.BusinessDate = DATEADD(DAY,-2,EasterSunday);
-- Easter Sunday
UPDATE #BusCalDet
SET IsHoliday = 0,Description = Description + ' Easter Sunday'
FROM #BusCalDet AS dimdate
CROSS APPLY (SELECT dimdate.Year AS y) _y
CROSS APPLY (SELECT y / 100 AS c,y - 19 * y / 19 AS n) _nc
CROSS APPLY (SELECT (c - 17) / 25 AS k) _k
CROSS APPLY (SELECT c - c / 4 - (c - k) / 3 + 19 * n + 15 AS i1) _i1
CROSS APPLY (SELECT i1 - 30 * i1 / 30 AS i2) _i2
CROSS APPLY (SELECT i2 - (i2 / 28) * (1 - (i2 / 28) * 29 / (i2 + 1) * (21 - n) / 11) AS i) _i
CROSS APPLY (SELECT y + y / 4 + i + 2 - c + c / 4 AS j1) _j1
CROSS APPLY (SELECT j1 - 7 * j1 / 7 AS j) _j
CROSS APPLY (SELECT i - j AS el) _el
CROSS APPLY (SELECT 3 + (el + 40) / 44 AS m) _m
CROSS APPLY (SELECT el + 28 - 31 * m / 4 AS d) _d
CROSS APPLY (SELECT DATEFROMPARTS (y,m,d) AS EasterSunday) _Easter
WHERE dimdate.BusinessDate = EasterSunday;
-- Labour Day -- first Monday of September
UPDATE #BusCalDet
SET IsHoliday = 1,Description = Description + ' Labour Day'
FROM #BusCalDet AS c1
WHERE c1.[Month] = 9
AND c1.DayOfWeek = 2
AND c1.Day BETWEEN 1 AND 7;
-- Set Thanksgiving
UPDATE #BusCalDet
SET IsHoliday = 1,Description = Description + ' Thanksgiving'
FROM #BusCalDet AS c1
WHERE c1.[Month] = 10
AND c1.DayOfWeek = 2
AND c1.Day BETWEEN 8 AND 14;
---- Christmas
UPDATE #BusCalDet
SET IsHoliday = 1,Description = Description + ' Christmas Holidays'
FROM #BusCalDet
WHERE [Month] = 12
AND Day BETWEEN 26 AND 28
AND (DATEPART(WEEKDAY,CAST(DATEPART(YEAR,BusinessDate) AS VARCHAR) + '-12-25') IN (1,7) -- Is Christmas on a weekend this year
OR DATEPART(WEEKDAY,CAST(DATEPART(YEAR,BusinessDate) AS VARCHAR) + '-12-26') IN (1,7)) -- Is Boxingday on a weekend this year
AND DATEPART(dw,BusinessDate) <> 4 -- NOT ON Wednesday!
AND DATEPART(DAY,(SELECT CASE (@@DATEFIRST + DATEPART(dw,BusinessDate)) % 7
WHEN 0 THEN DATEADD(DAY,2,BusinessDate) -- Saturday
WHEN 1 THEN DATEADD(DAY,1,BusinessDate) -- Sunday
ELSE BusinessDate
END AS Weekday)) BETWEEN 26
AND 28
OR [Month] = 12 -- Is christmas a week day?
AND Day BETWEEN 25 AND 26
AND IsWeekday = 1;
-- Match orig table Schema
ALTER TABLE #BusCalDet DROP COLUMN Day, Week, [Month], Quarter, [Year], DayOfWeek;
-- Insert in to the main table'
INSERT INTO dbo.BusinessCalendarDetails (BusinessDate,CreatedById,CreatedTime,BusinessCalendarId,IsWeekday,
IsHoliday,[Description])
-- Find Rows that are missing
SELECT DT.BusinessDate,DT.CreatedById,DT.CreatedTime,DT.BusinessCalendarId,DT.IsWeekday,DT.IsHoliday,
DT.[Description]
FROM #BusCalDet DT
LEFT JOIN BusinessCalendarDetails ON BusinessCalendarDetails.BusinessDate = DT.BusinessDate
WHERE BusinessCalendarDetails.Id IS NULL
ORDER BY DT.BusinessDate;-- id