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[英]How do I make an SQL trigger that grabs the data that was passed into the query which activated the trigger?
[英]How do I write cursor which is passed to other sql query?
我有一条select
语句,可以给我以下结果
MasterID Date
123 2012-10-15 00:00:00.000
124 2012-12-03 00:00:00.000
453 2012-01-07 00:00:00.000
(output is having 1999 rows)
现在我需要将此输出传递给一个标量值函数
MyCalculationFunction (@masterID,@date,@previousdate)
我想将上述值传递给MyCalculationFunction
以便我只能选择该函数并查看每个masterID
的所有值
我还需要在那儿提供previousdate
作为参数。
因此,请帮助我创建可以使用的任何游标。
在SQL Server 2012中:
SELECT myCalculationFunction
(
masterId,
[date],
LAG([date]) OVER (ORDER BY [date])
)
FROM mytable m
ORDER BY
[date]
在早期版本中:
SELECT myCalculationFunction
(
masterId,
[date],
(
SELECT TOP 1
[date]
FROM mytable mi
WHERE mi.[date] < m.[date]
ORDER BY
mi.[date] DESC
)
)
FROM mytable m
ORDER BY
[date]
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