我有一个 SQL 2005 SSIS 包，它每月向政府办公室报告，该报告应在每个月的最后一个星期四到期。我设置了 SQL Server 以在正确的日子运行包。安排报告时间不是问题。
现在 SSIS 包会创建一个月至今的报告。我使用了两个变量。一个 BeginDate，它使用表达式来确定该月的第一天并将其转换为类似“5/1/2012”的字符串。同样，还有 EndDate 会吐出今天的日期，例如“2012 年 5 月 3 日”。
有没有办法将 BeginDate 变量设置为上次运行报告后的第二天？有没有更好的方法来找出上个月最后一个星期四的日期？
在我的脑海中，有多种方法可以解决这个问题。
选项1
由于您使用的是 SQL 代理，因此请使用SQL 代理。创建作业时，单击该框以确保您正在保存历史记录。假设您的数据库维护策略没有删除过去一个月的作业历史记录，您应该能够编写查询以确定作业步骤最后一次成功完成的时间。在执行 SQL 步骤中运行这样的查询将产生 SSIS 步骤最后一次成功运行的时间。您需要做的就是将第三个元素的值分配给 EndDate 变量
-- this query will find the most recent, successful execution of a job
-- named 'Last Thursday Of the Month job' with a job step of
-- 'The SSIS Step'
SELECT
J.name AS job_name
, JH.step_name AS job_step_name
, MAX(msdb.dbo.agent_datetime(JH.run_date, JH.run_time)) AS execution_datetime
FROM
msdb.dbo.sysjobhistory JH
INNER JOIN
msdb.dbo.sysjobs J
ON J.job_id = JH.job_id
INNER JOIN
msdb.dbo.sysjobsteps JS
ON JS.job_id = J.job_id
AND JS.step_id = JH.step_id
WHERE
JH.run_status = 1
AND J.name = 'Last Thursday Of the Month job'
AND JH.step_name = 'The SSIS Step'
GROUP BY
J.name
, JH.step_name;
选项 2
创建一个自定义表并让您的工作将最后处理日期记录到该表中。该过程在处理开始时查看该表并使用最后日期作为结束日期。
CREATE TABLE dbo.AlmostEndOfTheMonth
(
-- Can't use date as you're on 2005
execution_date datetime
);
SELECT
MAX(AEOM.execution_date) AS most_recent_execution_date
FROM
dbo.AlmostEndOfTheMonth AEOM;
选项 3
用你最喜欢的语言（.NET、TSQL，甚至 SSIS 表达式语言都可以，但我不会尝试）计算一个月的最后一个星期四
DECLARE
@daysInWeek int
, @dayOfWeek int
SELECT
@daysInWeek = 7
, @dayOfWeek = 5;
; WITH LAST_DAY_OF_PREVIOUS_MONTH (last_day_month) AS
(
--http://blog.sqlauthority.com/2007/08/18/sql-server-find-last-day-of-any-month-current-previous-next/
-- SQL 2012 makes this much easier with EOM and/or datefromparts functions
SELECT DATEADD(s,-1,DATEADD(mm, DATEDIFF(m,0,GETDATE()),0))
)
, LAST_THURSDAY_REFERENCE (last_thursday, last_day_month) AS
(
SELECT CAST('2012-01-26' AS datetime), cast('2012-01-31' AS datetime)
UNION ALL SELECT CAST('2012-02-23' AS datetime), cast('2012-02-29' AS datetime)
UNION ALL SELECT CAST('2012-03-29' AS datetime), cast('2012-03-31' AS datetime)
UNION ALL SELECT CAST('2012-04-26' AS datetime), cast('2012-04-30' AS datetime)
UNION ALL SELECT CAST('2012-05-31' AS datetime), cast('2012-05-31' AS datetime)
UNION ALL SELECT CAST('2012-06-28' AS datetime), cast('2012-06-30' AS datetime)
UNION ALL SELECT CAST('2012-07-26' AS datetime), cast('2012-07-31' AS datetime)
UNION ALL SELECT CAST('2012-08-30' AS datetime), cast('2012-08-31' AS datetime)
UNION ALL SELECT CAST('2012-09-27' AS datetime), cast('2012-09-30' AS datetime)
UNION ALL SELECT CAST('2012-10-25' AS datetime), cast('2012-10-31' AS datetime)
UNION ALL SELECT CAST('2012-11-29' AS datetime), cast('2012-11-30' AS datetime)
UNION ALL SELECT CAST('2012-12-27' AS datetime), cast('2012-12-31' AS datetime)
)
SELECT
*
-- Thursday is the 5th day of the week, assuming you haven't messed with calendar's start of week
-- We need to subtract up to 6 days from the end of the month to find the
-- last Thursday. We can use the mod operator on ensure our dateadd function doesn't modify the
-- date if the end of the month is actually Thursday, otherwise we want to back it off N days
-- Examples might be easier to understand
-- Last day DayWeek WeekdayNumber DaysToSubtract
-- 2012-01-31 Tuesday 3 -5
-- 2012-02-29 Wednesday 4 -6
-- 2012-03-31 Saturday 7 -2
-- 2012-04-30 Monday 2 -4
-- 2012-05-31 Thursday 5 0
-- 2012-06-30 Saturday 7 -2
-- 2012-07-31 Tuesday 3 -5
-- 2012-08-31 Friday 6 -1
-- 2012-09-30 Sunday 1 -3
-- 2012-10-31 Wednesday 4 -6
-- 2012-11-30 Friday 6 -1
-- 2012-12-31 Monday 2 -4
, dateadd(d, -((@daysInWeek - @dayOfWeek) + DATEPART(dw, LDM.last_day_month)) % @daysInWeek, LDM.last_day_month) AS last_thursday_of_month
FROM
LAST_DAY_OF_PREVIOUS_MONTH LDM
-- Comment the above and uncomment the below to
-- evaluate all the dates in the 2012
-- LAST_THURSDAY_REFERENCE LDM
选项 4
与选项 1 类似，但使用 SSIS 日志记录，登录到 SQL Server，然后查找上次成功执行的日期并将其用作结束日期。
-- this code is approximate, I don't have a 2005 instance about
-- if you've logged to a different database, change the msdb reference
SELECT
max(starttime) AS execution_datetime
FROM
msdb.dbo.sysdtslog90 L
WHERE
L.event = 'PackageStart'
AND L.source = 'MyPackage';