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我被迫使用具有以下结构 (ScheduledEmails) 的表，并希望找到处理多个变量设置为 1 (true) 的最有效方法

如果只选择了一个，下面的脚本只会返回正确的值。

任何人都可以推荐一种修改底部查询以适应多个条件的方法。

例如@IsMonday 和@IsTuesday 在哪里是真的等等？

我尝试了多种 AND/OR 组合，但似乎都没有产生预期的结果。

DECLARE @IsMonday bit
DECLARE @IsTuesday bit
DECLARE @IsWednesday bit
DECLARE @IsThursday bit
DECLARE @IsFriday bit
DECLARE @IsSaturday bit
DECLARE @IsSunday bit
DECLARE @Is0000 bit
DECLARE @Is0100 bit
DECLARE @Is0200 bit
DECLARE @Is0300 bit
DECLARE @Is0400 bit
DECLARE @Is0500 bit
DECLARE @Is0600 bit
DECLARE @Is0700 bit
DECLARE @Is0800 bit
DECLARE @Is0900 bit
DECLARE @Is1000 bit
DECLARE @Is1100 bit
DECLARE @Is1200 bit
DECLARE @Is1300 bit
DECLARE @Is1400 bit
DECLARE @Is1500 bit
DECLARE @Is1600 bit
DECLARE @Is1700 bit
DECLARE @Is1800 bit
DECLARE @Is1900 bit
DECLARE @Is2000 bit
DECLARE @Is2100 bit
DECLARE @Is2200 bit
DECLARE @Is2300 bit

DECLARE @dayOfWeek VARCHAR(20)
DECLARE @hourOfDay int

SET @dayOfWeek = datename(dw,GETDATE()) -- Monday to Sunday
SET @hourOfDay = datepart(hh, GETDATE()) -- Single digit 0 - 23

SET @IsMonday = CASE WHEN @dayOfWeek = 'Monday' THEN 1 ELSE 0 END
SET @IsTuesday = CASE WHEN @dayOfWeek = 'Tuesday' THEN 1 ELSE 0 END
SET @IsWednesday = CASE WHEN @dayOfWeek = 'Wednesday' THEN 1 ELSE 0 END
SET @IsThursday = CASE WHEN @dayOfWeek = 'Thursday' THEN 1 ELSE 0 END
SET @IsFriday = CASE WHEN @dayOfWeek = 'Friday' THEN 1 ELSE 0 END
SET @IsSaturday = CASE WHEN @dayOfWeek = 'Saturday' THEN 1 ELSE 0 END
SET @IsSunday = CASE WHEN @dayOfWeek = 'Sunday' THEN 1 ELSE 0 END
SET @Is0000 = CASE WHEN @hourOfDay = 0 THEN 1 ELSE 0 END
SET @Is0100 = CASE WHEN @hourOfDay = 1 THEN 1 ELSE 0 END
SET @Is0200 = CASE WHEN @hourOfDay = 2 THEN 1 ELSE 0 END
SET @Is0300 = CASE WHEN @hourOfDay = 3 THEN 1 ELSE 0 END
SET @Is0400 = CASE WHEN @hourOfDay = 4 THEN 1 ELSE 0 END
SET @Is0500 = CASE WHEN @hourOfDay = 5 THEN 1 ELSE 0 END
SET @Is0600 = CASE WHEN @hourOfDay = 6 THEN 1 ELSE 0 END
SET @Is0700 = CASE WHEN @hourOfDay = 7 THEN 1 ELSE 0 END
SET @Is0800 = CASE WHEN @hourOfDay = 8 THEN 1 ELSE 0 END
SET @Is0900 = CASE WHEN @hourOfDay = 9 THEN 1 ELSE 0 END
SET @Is1000 = CASE WHEN @hourOfDay = 10 THEN 1 ELSE 0 END
SET @Is1100 = CASE WHEN @hourOfDay = 11 THEN 1 ELSE 0 END
SET @Is1200 = CASE WHEN @hourOfDay = 12 THEN 1 ELSE 0 END
SET @Is1300 = CASE WHEN @hourOfDay = 13 THEN 1 ELSE 0 END
SET @Is1400 = CASE WHEN @hourOfDay = 14 THEN 1 ELSE 0 END
SET @Is1500 = CASE WHEN @hourOfDay = 15 THEN 1 ELSE 0 END
SET @Is1600 = CASE WHEN @hourOfDay = 16 THEN 1 ELSE 0 END
SET @Is1700 = CASE WHEN @hourOfDay = 17 THEN 1 ELSE 0 END
SET @Is1800 = CASE WHEN @hourOfDay = 18 THEN 1 ELSE 0 END
SET @Is1900 = CASE WHEN @hourOfDay = 19 THEN 1 ELSE 0 END
SET @Is2000 = CASE WHEN @hourOfDay = 20 THEN 1 ELSE 0 END
SET @Is2100 = CASE WHEN @hourOfDay = 21 THEN 1 ELSE 0 END
SET @Is2200 = CASE WHEN @hourOfDay = 22 THEN 1 ELSE 0 END
SET @Is2300 = CASE WHEN @hourOfDay = 23 THEN 1 ELSE 0 END

INSERT INTO ScheduledEmailQueue (ScheduledEmailId, Created)
SELECT Id, GETDATE() FROM ScheduledEmails WHERE 
(SendMonday = @IsMonday AND
SendTuesday = @IsTuesday AND
SendWednesday = @IsWednesday AND
SendThursday= @IsThursday AND
SendFriday = @IsFriday AND
SendSaturday = @IsSaturday AND
SendSunday = @IsSunday AND
Send0000 = @Is0000 AND
Send0100 = @Is0100 AND 
Send0200 = @Is0200 AND 
Send0300 = @Is0300 AND 
Send0400 = @Is0400 AND 
Send0500 = @Is0500 AND 
Send0600 = @Is0600 AND 
Send0700 = @Is0700 AND 
Send0800 = @Is0800 AND 
Send0900 = @Is0900 AND 
Send1000 = @Is1000 AND 
Send1100 = @Is1100 AND 
Send1200 = @Is1200 AND 
Send1300 = @Is1300 AND 
Send1400 = @Is1400 AND 
Send1500 = @Is1500 AND 
Send1600 = @Is1600 AND 
Send1700 = @Is1700 AND 
Send1800 = @Is1800 AND 
Send1900 = @Is1900 AND 
Send2000 = @Is2000 AND 
Send2100 = @Is2100 AND 
Send2200 = @Is2200 AND 
Send2300 = @Is2300)

SELECT Id, GETDATE() FROM ScheduledEmails WHERE 
SendMonday= @IsMonday AND
SendTuesday = @IsTuesday AND
SendWednesday = @IsWednesday AND
SendThursday= @IsThursday AND
SendFriday = @IsFriday AND
SendSaturday = @IsSaturday AND
SendSunday = @IsSunday AND
Send0000 = @Is0000 AND
Send0100 = @Is0100 AND 
Send0200 = @Is0200 AND 
Send0300 = @Is0300 AND 
Send0400 = @Is0400 AND 
Send0500 = @Is0500 AND 
Send0600 = @Is0600 AND 
Send0700 = @Is0700 AND 
Send0800 = @Is0800 AND 
Send0900 = @Is0900 AND 
Send1000 = @Is1000 AND 
Send1100 = @Is1100 AND 
Send1200 = @Is1200 AND 
Send1300 = @Is1300 AND 
Send1400 = @Is1400 AND 
Send1500 = @Is1500 AND 
Send1600 = @Is1600 AND 
Send1700 = @Is1700 AND 
Send1800 = @Is1800 AND 
Send1900 = @Is1900 AND 
Send2000 = @Is2000 AND 
Send2100 = @Is2100 AND 
Send2200 = @Is2200 AND 
Send2300 = @Is2300
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1 回答 1

1

如果我正确理解了您的要求，您只想从 ScheduledEmails 表中选择当前星期几和小时的记录，并将它们插入到 ScheduledEmailQueue 表中。如果确实如此，您可以创建一个动态 sql 查询并执行它。如果我没有正确理解您的要求，那么我提前道歉:)

DECLARE @dayOfWeek VARCHAR(20)
DECLARE @hourOfDay INT
DECLARE @hourOfDayColumnName VARCHAR(20)
DECLARE @dayOfWeekColumnName VARCHAR(20)
DECLARE @sql VARCHAR(MAX)

SET @dayOfWeek = datename(dw,GETDATE()) -- Monday to Sunday
SET @hourOfDay = datepart(hh, GETDATE()) -- Single digit 0 - 23
SET @hourOfDayColumnName = 'Send' + CASE WHEN LEN(@hourOfDay) = 1 THEN '0' + CONVERT(VARCHAR, @hourOfDay) ELSE CONVERT(VARCHAR, @hourOfDay) END + '00'
SET @dayOfWeekColumnName = 'Send' + @dayOfWeek
SET @sql = 'INSERT INTO ScheduledEmailQueue (ScheduledEmailId, Created)
SELECT Id, GETDATE() FROM ScheduledEmails WHERE ' + @dayOfWeekColumnName + ' = 1 AND ' + @hourOfDayColumnName + ' = 1'

PRINT @hourOfDayColumnName
PRINT @dayOfWeekColumnName
PRINT @sql
EXEC (@sql)

对不起，我看错了你的问题，但我仍然不清楚你的要求。如果您使用 DayOfWeek 和 Hour，它们将始终返回奇异值（例如星期一和 22）。如果要根据多个条件选择值，则必须执行简单的硬编码查询，例如：

SELECT Id, GETDATE() FROM ScheduledEmails WHERE 
SendMonday= 1 AND
SendTuesday = 1 AND
Send0000 = 1 AND
Send0100 = 1

如果您事先不知道所需天数和数小时的值，那么您可以将它们作为参数传递给存储的过程并使用它们进行过滤。

于 2012-09-12T15:29:19.760 回答