查询表,临时表,子查询连接问题

时间:2013-02-21 22:16:13

标签: tsql sql-server-2005 subquery inner-join temp-tables

我有一个查询,我在开始时创建2个临时表,然后我查询我的数据库中的现有表并将此表连接到子查询,然后最后连接到其中一个临时表。当我这样做时,我得到一个错误,我从现有表加入的密钥不能绑定。奇怪的是,如果我取出对子查询的所有引用,只留下查询与现有的表和它加入的临时表,并且如果我将现有的表联合到子suery它就可以正常工作。

但是当我尝试将所有3个放在一起时,它给了我“多部分识别的z。[currnecy key]无法绑定”,这似乎是一个奇怪的错误,因为这个键在现有的表中并加入单独使用临时表或子查询,但不能同时使用。

我知道加入子查询的问题,但在这种情况下似乎问题似乎是在同一查询中加入子查询和临时表,我不知道如何解决。< / p>

代码如下。

declare @tmpFx table (currency_key int, effective_date_key int, expiration_date_key int, to_usd float, from_usd float ) --primary key (currency_key, date_key))
    insert into @tmpFx(currency_key, effective_date_key, expiration_date_key, to_usd, from_usd)
    select [currency key], cast(convert(char(8),[effective date],112) as int), cast(convert(char(8),[expiration date],112) as int), [to usd], [from usd]
    from v_fx --where [effective date] >= @beginDate

declare @fixedFx table (currency_key int, to_usd float, from_usd float primary key (currency_key))
    insert into @fixedFx(currency_key, to_usd, from_usd)
    select [currency key], [to usd], [from usd] 
    from v_fx where [effective date] = '2012-01-01'

select z.[currency key], --stat_fx.to_usd to_usd, stat_fx.from_usd from_usd, --q.*,-- 
stat_usd_amt2 = case when z.[currency key] = 100001 then q.orig_amt else 0 end --sum(q.orig_amt * stat_fx.to_usd)
from [dim country] z,
(select b.country_key, a.currency_key, a.data_type_key, sum(a.amount) orig_amt,
    sum(a.amount * stat_fx.to_usd) stat_usd_amt, 
    sum((a.amount * stat_fx.to_usd) * stat_fx.from_usd) home_curr_amt 
    from tbl_cohort a 
    inner join tbl_management_code b on a.management_code = b.management_code
    left outer join @tmpFx stat_fx on a.currency_key = stat_fx.currency_key
    where a.data_type_key = 1
    and a.date_key > 20111231
    group by b.country_key, a.currency_key, a.data_type_key) q
inner join @tmpFx stat_fx on z.[currency key] = stat_fx.currency_key
where q.[country_key]= z.[country key]

1 个答案:

答案 0 :(得分:1)

我相信这是因为你在旧样式和新样式之间混合连接格式(如建议的那样)。我能够用我自己的数据模拟一个类似的问题,并得到与未绑定标识符相同的错误。请改为尝试以下内容。

declare @tmpFx table (currency_key int, effective_date_key int, expiration_date_key int, to_usd float, from_usd float)
    insert into @tmpFx(currency_key, effective_date_key, expiration_date_key, to_usd, from_usd)
    select [currency key], cast(convert(char(8),[effective date],112) as int), cast(convert(char(8),[expiration date],112) as int), [to usd], [from usd]
    from v_fx

declare @fixedFx table (currency_key int, to_usd float, from_usd float primary key (currency_key))
    insert into @fixedFx(currency_key, to_usd, from_usd)
    select [currency key], [to usd], [from usd] 
    from v_fx where [effective date] = '2012-01-01'

select z.[currency key], 
    case when z.[currency key] = 100001 then q.orig_amt else 0 end AS stat_usd_amt2
from [dim country] z
JOIN (
    select b.country_key, a.currency_key, a.data_type_key, sum(a.amount) AS orig_amt,
    sum(a.amount * stat_fx.to_usd) as stat_usd_amt, 
    sum((a.amount * stat_fx.to_usd) * stat_fx.from_usd) as home_curr_amt 
    from tbl_cohort a 
    join tbl_management_code b
        on a.management_code = b.management_code
    left join @tmpFx stat_fx
        on a.currency_key = stat_fx.currency_key
    where a.data_type_key = 1
      and a.date_key > 20111231
    group by b.country_key, a.currency_key, a.data_type_key
) q
    ON q.[country_key] = z.[country_key]
join @tmpFx stat_fx 
    on z.[currency key] = stat_fx.currency_key

当我离开你的第二个临时表(@fixedFx)时,你可能想要删除它,如果你没有计划使用它的数据。

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