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[英]How to create sql table that changes dynamically the order of the columns based on current date/month?
[英]How to create Temp Table with month columns based on date parameters?
我有一個接受兩個日期的存儲過程。 在存儲過程中,我需要創建一個臨時表,其中以兩個日期之間的月份為列。
例如,
如果用戶通過
1/1/2016 , 8/1/2016
我需要一個帶有列的臨時表:
January February March April May June July August
如何使用以這種方式創建的列來創建這種類型的臨時表? 列基於傳入的兩個日期?
以下腳本可以幫助您開始(並且幾乎可以開始使用):
declare @start_date DATE = '20160101'
declare @end_date DATE = '20160801'
;WITH CTE AS
(
SELECT @start_date AS cte_start_date, DATENAME(month, @start_date) AS Name,
CAST(' ALTER TABLE #myTemp ADD ' + DATENAME(month, @start_date) + ' INT ' + CHAR(13) + CHAR(10) AS VARCHAR(8000)) AS SqlStr
UNION ALL
SELECT DATEADD(MONTH, 1, cte_start_date), DATENAME(month, DATEADD(MONTH, 1, cte_start_date)) AS Name,
CAST(SqlStr + ' ALTER TABLE #myTemp ADD ' + DATENAME(month, DATEADD(MONTH, 1, cte_start_date)) + ' INT ' + CHAR(13) + CHAR(10) AS VARCHAR(8000))
FROM CTE
WHERE DATEADD(MONTH, 1, cte_start_date) <= @end_date
)
SELECT cte_start_date, Name, SqlStr
FROM CTE
使用遞歸CTE,它將在開始日期和結束日期之間生成一個循環,並針對每個月計算其字符串表示形式,並創建一個alter腳本以將列添加到臨時表中。
CTE逐步計算SQL腳本,因此最終腳本位於最后一行。
嘗試這個 ....
declare @start_date DATE = '20160101'
declare @end_date DATE = '20160801'
;WITH CTE AS
(
SELECT @start_date AS cte_start_date, DATENAME(month, @start_date) AS NAME , 0 AS Coun
UNION ALL
SELECT DATEADD(MONTH, 1, cte_start_date), DATENAME(month, DATEADD(MONTH, 1, cte_start_date)) AS NAME , 0 AS Coun
FROM CTE
WHERE DATEADD(MONTH, 1, cte_start_date) <= @end_date
)
SELECT Coun,Name
INTO #tmp1
FROM CTE
DECLARE @cols AS NVARCHAR(MAX),
@query AS NVARCHAR(MAX)
select @cols = STUFF((SELECT ',' + Name
from #tmp1
FOR XML PATH(''), TYPE
).value('.', 'NVARCHAR(MAX)')
,1,1,'')
set @query = 'SELECT ' + @cols + ' from
(
select Coun,Name
from #tmp1
) x
pivot
(
MAX(Coun)
for Name in (' + @cols + ')
) p '
execute(@query);
DROP TABLE #tmp1
它將像您的預期輸出一樣返回OutPut。
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