从SQL Server中的两个不同的临时表中减去两列

Question

我正在尝试比较上一年和当前年份参数的数据。 我创建了三个临时表，分别称为#currentyear ， #previous_year和#comparison_over_previous_year 。

#currentyear数据是从存储过程中提取的，我也想从存储过程中提取上一年的数据。 当试图在执行存储过程时传递DATEADD函数时，T-SQL不喜欢它。 现在，我在其中传递了静态数据。

我想从#currentyear临时表和#previous_year临时表中减去Money字段，但是我遇到了#previous_year 。

到目前为止，我的代码如下：

IF OBJECT_ID('tempdb..#currentyear') IS NOT NULL 
    DROP TABLE #currentyear

IF OBJECT_ID('tempdb..#previousyear') IS NOT NULL 
    DROP TABLE #previousyear

IF OBJECT_ID('tempdb..#comparison_over_previous_year') IS NOT NULL 
    DROP TABLE #comparison_over_previous_year

CREATE TABLE #currentyear
(
     [Date] DATE,
     [Carrier] VARCHAR(100),
     [Direct Ceded Written Premium] MONEY,
     [begofmonth] DATE 
)

CREATE TABLE #previousyear
(
     [Date] DATE,
     [Carrier] VARCHAR(100),
     [Direct Ceded Written Premium] MONEY,
     [begofmonth] DATE 
)

CREATE TABLE #comparison_over_previous_year
(
     [Date] DATE,
     [Carrier] VARCHAR(100),
     [Direct Ceded Written Premium] MONEY,
     [begofmonth] DATE 
)

INSERT INTO #currentyear
    EXECUTE [dbo].[rpt_written_premium_extract_CURRENT_YEAR_RPT-4518] 
                  @StartDate = '20160101', @EndDate = '20161130', 
                  @ResEQCarrierCd = 'Palomar'

INSERT INTO #previousyear
    EXECUTE [dbo].[rpt_written_premium_extract_CURRENT_YEAR_RPT-4518] 
           --DATEADD(YEAR,-1,@StartDate) = '20160101'
           --DATEADD(YEAR,-1,@EndDate) = '20161130'
           @StartDate = '20150101', **--Using this static value from now as the script above is not playing nice**
           @EndDate = '20151130', @ResEQCarrierCd = 'Palomar'

INSERT INTO #comparison_over_previous_year
    SELECT 
        cy.[Date], cy.[Carrier],
        cy.[Direct Ceded Written Premium] - py.[Direct Ceded Written Premium],
        cy.[begofmonth]
    FROM
        #currentyear cy
    JOIN 
        #previousyear py ON py.[Carrier] = cy.[Carrier]

----Selects the data in order to dump into SSRS
SELECT *
FROM #comparison_over_previous_year

所以我在这里有两个问题：

• 一种是DATEADD函数不能通过EXEC语句传递

• 二是我一直在尝试从#currentyear和#previous_year表中减去[Direct Ceded Written Premium] #currentyear [Direct Ceded Written Premium]列的#previous_year 。 看来我需要按运营商和begofmonth分组。 去年可能没有每个月的所有运营商。 例如，2015年1月的月份可能没有palomar作为承运人，而2016年1月则是。 因此，它们不必被减去。 如果两年都存在palomar，则将其减去。 希望有道理。

这是我将其导出到excel时要在SSRS中输出的结果：

Answer 1

Dateadd函数不能用作参数。 你可以这样声明一个变量

Declare @ProcStartdate datetime = DATEADD(YEAR,-1,@startdate)
Declare @ProcEnddate datetime = DATEADD(YEAR,-1,@Enddate)

INSERT INTO #previousyear
EXECUTE [dbo].[rpt_written_premium_extract_CURRENT_YEAR_RPT-4518] 

@ProcStartdate 
,@ProcEnddate 
,@ResEQCarrierCd = 'Palomar'

Answer 2

为什么不只在代码中使用静态变量并在需要的地方设置它？

IF OBJECT_ID('tempdb..#currentyear') IS NOT NULL 
    DROP TABLE #currentyear

IF OBJECT_ID('tempdb..#previousyear') IS NOT NULL 
    DROP TABLE #previousyear

IF OBJECT_ID('tempdb..#comparison_over_previous_year') IS NOT NULL 
    DROP TABLE #comparison_over_previous_year

CREATE TABLE #currentyear
(
     [Date] DATE,
     [Carrier] VARCHAR(100),
     [Direct Ceded Written Premium] MONEY,
     [begofmonth] DATE 
)

CREATE TABLE #previousyear
(
     [Date] DATE,
     [Carrier] VARCHAR(100),
     [Direct Ceded Written Premium] MONEY,
     [begofmonth] DATE 
)

CREATE TABLE #comparison_over_previous_year
(
     [Date] DATE,
     [Carrier] VARCHAR(100),
     [Direct Ceded Written Premium] MONEY,
     [begofmonth] DATE 
)

DECLARE @start datetime, @end datetime

--variables to hold dates in procs
set @start = '20160101'
set @end = '20161130'

INSERT INTO #currentyear
    EXECUTE [dbo].[rpt_written_premium_extract_CURRENT_YEAR_RPT-4518] 
                  @StartDate = @start, @EndDate = @end, 
                  @ResEQCarrierCd = 'Palomar'

--reset them to -1 year of themselves
set @start = DATEADD(YEAR,-1,@start)
set @end = DATEADD(YEAR,-1,@end)

INSERT INTO #previousyear
    EXECUTE [dbo].[rpt_written_premium_extract_CURRENT_YEAR_RPT-4518] 

           @StartDate = @start,
           @EndDate = @end

INSERT INTO #comparison_over_previous_year
    SELECT 
        cy.[Date], cy.[Carrier],
        cy.[Direct Ceded Written Premium] - py.[Direct Ceded Written Premium],
        cy.[begofmonth]
    FROM
        #currentyear cy
    JOIN 
        #previousyear py ON py.[Carrier] = cy.[Carrier]

----Selects the data in order to dump into SSRS
SELECT *
FROM #comparison_over_previous_y

但是 ，您要完成的减法仅取决于每个运营商每个日期的一行。 您应该在插入数据之前更改过程以聚合数据，但是这里我正在将数据存储到另一个临时表中，因此您不必更改proc。

IF OBJECT_ID('tempdb..#currentyear') IS NOT NULL 
    DROP TABLE #currentyear

IF OBJECT_ID('tempdb..#previousyear') IS NOT NULL 
    DROP TABLE #previousyear

IF OBJECT_ID('tempdb..#currentyearAggregate') IS NOT NULL 
DROP TABLE #currentyearAggregate

IF OBJECT_ID('tempdb..#previousyearAggregate') IS NOT NULL 
DROP TABLE #previousyearAggregate

IF OBJECT_ID('tempdb..#comparison_over_previous_year') IS NOT NULL 
    DROP TABLE #comparison_over_previous_year

CREATE TABLE #currentyear
(
        [Date] DATE,
        [Carrier] VARCHAR(100),
        [Direct Ceded Written Premium] MONEY,
        [begofmonth] DATE 
)

--New Temp Table to hold Aggregated Data
CREATE TABLE #currentyearAggregate
(
        [Date] DATE,
        [Carrier] VARCHAR(100),
        [Direct Ceded Written Premium] MONEY,
        [begofmonth] DATE 
)

CREATE TABLE #previousyear
(
        [Date] DATE,
        [Carrier] VARCHAR(100),
        [Direct Ceded Written Premium] MONEY,
        [begofmonth] DATE 
)

--New Temp Table to hold Aggregated Data
CREATE TABLE #previousyearAggregate
(
        [Date] DATE,
        [Carrier] VARCHAR(100),
        [Direct Ceded Written Premium] MONEY,
        [begofmonth] DATE 
)

CREATE TABLE #comparison_over_previous_year
(
        [Date] DATE,
        [Carrier] VARCHAR(100),
        [Direct Ceded Written Premium] MONEY,
        [begofmonth] DATE 
)

DECLARE @start datetime, @end datetime

--variables to hold dates in procs
set @start = '20160101'
set @end = '20161130'

INSERT INTO #currentyear
    EXECUTE [dbo].[rpt_written_premium_extract_CURRENT_YEAR_RPT-4518] 
                    @StartDate = @start, @EndDate = @end, 
                    @ResEQCarrierCd = 'Palomar'

--reset them to -1 year of themselves
set @start = DATEADD(YEAR,-1,@start)
set @end = DATEADD(YEAR,-1,@end)

INSERT INTO #previousyear
    EXECUTE [dbo].[rpt_written_premium_extract_CURRENT_YEAR_RPT-4518] 
            @StartDate = @start,
            @EndDate = @end

--Sum up the premiums for each day
INSERT INTO #previousyearAggregate
    SELECT
        [Date],
        [Carrier],
        SUM([Direct Ceded Written Premium]) as [Direct Ceded Written Premium],
        [begofmonth]
    FROM 
        #previousyear
    GROUP BY
        [Date],
        [Carrier],
        [begofmonth]

--Sum up the premiums for each day
INSERT INTO #currentyearAggregate
    SELECT
        [Date],
        [Carrier],
        SUM([Direct Ceded Written Premium]) as [Direct Ceded Written Premium],
        [begofmonth]
    FROM 
        #currentyear
    GROUP BY
        [Date],
        [Carrier],
        [begofmonth]

INSERT INTO #comparison_over_previous_year
    SELECT 
        cy.[Date], 
        cy.[Carrier],
        cy.[Direct Ceded Written Premium] - py.[Direct Ceded Written Premium],
        cy.[begofmonth]
    FROM
        #currentyearAggregate cy
    JOIN 
        #previousyearAggregate py ON 
        py.[Carrier] = cy.[Carrier] 
        and py.[Date] = cy.[Date]              --Added this join condition

--Selects the data in order to dump into SSRS
SELECT *
FROM #comparison_over_previous_year