Question

这是我冗长的SQL代码。我本质上是尝试将数据库信息从月度，每日和每年的费率转换为每小时。然后将此小时数转换为美元（如果尚未转换为美元）。

到目前为止，我将UOM转换为“转换率”，但在转换为美元时如何使用此新转换率？即在：

当wo.currency ='GBP'然后（wo.avg_rate * 1.66）

我无法将wo.avg_rate更改为wo.converted_rate，x.converted_rate，“转换率”或“转换率”。我怎样才能做到这一点？

SELECT 
    x.work_order_ref as 'Work Order Reference'
    ,x.buyer_code as 'Buyer Code'
    ,x.submit_time as 'Work Order Submit Time'
    ,x.rate_unit_for_spend_calc as 'UOM'
    ,x.avg_rate as 'ST Rate'
    ,x.converted_rate as 'Converted Rate'
    ,x.currency as 'Currency'
    ,x.converted_amount AS 'Converted Amount'
    ,jp.title AS 'JP Title'
    ,lbt.name AS 'Labor Type'
    ,jp.max_distribution_level AS 'Max Distr Level'
    ,si.city AS 'City'
    ,si.state_province as 'State'
    ,si.country AS 'Country'
    ,ctg.name AS 'Category'
    ,count(jpd.supplier_code) as 'Suppliers'
from 
(select 
         wo.work_order_ref
         ,wo.buyer_code
         ,wo.submit_time
         ,wo.rate_unit_for_spend_calc 
         ,"converted_rate" = 
                        CASE
                        WHEN wo.rate_unit_for_spend_calc='Hr' then wo.avg_rate
                        WHEN wo.rate_unit_for_spend_calc='MO' then (wo.avg_rate/173.333)
                        WHEN wo.rate_unit_for_spend_calc='Day' then (wo.avg_rate/8)
                        WHEN wo.rate_unit_for_spend_calc='Yr' then (wo.avg_rate/2080)
                        END
         ,wo.avg_rate
         ,wo.currency
         ,wo.job_posting_id
         ,wo.site_id
         ,wo.worker_id
         ,wo.uploaded_flag
         ,wo.sequence
         ,"converted_amount" =
                        CASE
                        WHEN wo.currency='USD' then (wo.avg_rate)
                        WHEN wo.currency='GBP' then (wo.avg_rate*1.66)
                        WHEN wo.currency='SEK' then (wo.avg_rate*0.14)
                        WHEN wo.currency='EUR' then (wo.avg_rate*1.31)
                        WHEN wo.currency='CAD' then (wo.avg_rate*0.92)
                        WHEN wo.currency='AUD' then (wo.avg_rate*0.93)
                        WHEN wo.currency='INR' then (wo.avg_rate*0.017)
                        WHEN wo.currency='MXN' then (wo.avg_rate*0.076)
                        WHEN wo.currency='COP' then (wo.avg_rate*0.00052)
                        WHEN wo.currency='BRL' then (wo.avg_rate*0.44)
                        WHEN wo.currency='MYR' then (wo.avg_rate*0.32)
                        WHEN wo.currency='CNY' then (wo.avg_rate*0.16)
                        WHEN wo.currency='RON' then (wo.avg_rate*0.3)
                        WHEN wo.currency='CZK' then (wo.avg_rate*0.047)
                        WHEN wo.currency='SGD' then (wo.avg_rate*0.8)
                        WHEN wo.currency='PLN' then (wo.avg_rate*0.31)
                        WHEN wo.currency='JPY' then (wo.avg_rate*0.0096)
                        WHEN wo.currency='NZD' then (wo.avg_rate*0.84)
                        WHEN wo.currency='CHF' then (wo.avg_rate*1.09)
                        --ELSE (wo.avg_rate*x.conversion_factor)
                        END
    from work_order wo(nolock) ) as x

...

如果它让我更好地发布完整的代码和/或我得到的东西，我也可以这样做。

Answer 1

如果您将转化存储在表格中，则会使查询变得更加容易。您甚至可以摆脱内部查询：

declare @uom table (
    unit char(3) not null primary key,
    divisor decimal(10, 5) not null
);

insert into @uom values
    ('Hr', 1), ('MO', 173.333), ('Day', 8), ('Yr', 2080);

declare @rate table (
    currency char(3) not null primary key,
    usd_mult decimal(10, 5) not null
);

insert into @rate values
    ('USD', 1), ('GBP', 1.66), ('SEK', 0.14), ('EUR', 1.31),
    ('CAD', 0.92), ('AUD', 0.93), ('INR', 0.017), ('MXN', 0.076),
    ('COP', 0.00052), ('BRL', 0.44), ('MYR', 0.32), ('CNY', 0.16),
    ('RON', 0.3), ('CZK', 0.047), ('SGD', 0.8), ('PLN', 0.31),
    ('JPY', 0.0096), ('NZD', 0.84), ('CHF', 1.09);

select 
    wo.work_order_ref,
    wo.buyer_code,
    wo.submit_time,
    wo.rate_unit_for_spend_calc,
    wo.avg_rate / u.dividend as converted_rate,
    wo.avg_rate,
    wo.currency,
    wo.job_posting_id,
    wo.site_id,
    wo.worker_id,
    wo.uploaded_flag,
    wo.sequence,
    -- is this where you wanted converted_rate * currency_mult?
    wo.avg_rate / u.dividend * r.usd_mult as converted_amount
from 
    work_order wo with (nolock)
        inner join
    @uom u
        on wo.rate_unit_for_spend_calc = u.unit
        inner join
    @rate r
        on wo.currency = r.currency
)

如果失败，您可以隐藏功能背后的计算。这使事情更容易阅读，但可以减慢查询速度，因为优化器无法查看函数：

create function dbo.HourlyRate(@unit as char(3), @rate as decimal(10, 5)) returns decimal(10, 5) as
begin
    return case @unit
        when 'Hr' then @rate
        when 'MO' then @rate / 173.333
        when 'Day' then @rate / 8
        when 'Yr' then @rate / 2080
    end
end

create function dbo.ConvertToUSD(@currency as char(3), @amount as decimal(20, 5)) returns decimal(20, 5) as
begin
    return case @currency
        when 'USD' then @amount
        when 'GBP' then @amount * 1.66
        ...
    end
end

这样称呼：

select
    ...
    dbo.HourlyRate(wo.rate_unit_for_spend_calc, wo.avg_rate) as converted_rate,
    ...
    dbo.ConvertToUSD(wo.currency, dbo.HourlyRate(wo.rate_unit_for_spend_calc, wo_avg_rate) as converted_amount,
    ...
from
    work_order wo with (nolock)

使用另一个计算中的产品 - SQL select语句

1 个答案: