0

我在执行查询时收到错误 [ORA-01427: single-row subquery returns more than one row]。我的查询结构如下：

SELECT LV.PRICE,
 (SELECT C.MODEL_NAME FROM CARS C WHERE C.MODEL_ID = LV.MODEL_ID) as MODEL_NAME
FROM LEDGER_VIEW LV
WHERE LV.PRICE < 500

它打破了嵌套选择。我知道视图和此查询中的逻辑都是正确的，并且嵌套选择返回多于一行的机会是不可能的。CARS 表的 MODEL_ID 是一个唯一字段。如果我在没有嵌套选择的情况下执行查询，则不会返回此错误。

LEDGER_VIEW 是建立在另一个视图之上的视图。这些堆叠视图在 Oracle 10g 中是否可能存在错误？我不知道如何调试这个问题。

我知道我可以将此特定查询更改为联接而不是嵌套选择，但我想知道为什么会发生这种情况，因为我在其他不容易修改的地方使用嵌套查询。

编辑：这是真正奇怪的事情。正如我所说，LEDGER_VIEW 是建立在另一个视图之上的。作为测试，我将嵌套视图的 SQL 直接复制到 LEDGER_VIEW 的 SQL 的 SQL 中，代替了嵌套视图，并且它没有错误地返回（如预期的那样）。这似乎向我证实了嵌套视图或嵌套视图+数据库链接的组合存在一些错误行为。

4

5 回答 5

4

您的子查询返回多行。使用下面的查询来找出表中MODELID的哪些值Car是重复的：

select MODELID as CarsModelID, count(*) as Count
from cars 
where MODELID in (
    select MODEL_ID
    from LEDGER_VIEW  
    WHERE LV.PRICE < 500 
)
group by MODELID
having count(*) > 1
于 2010-09-27T14:36:42.433 回答
2

我无法通过创建堆叠视图来重新创建。（尽管 RedFilters 会找到罪魁祸首）

    CREATE TABLE t1
    (
        t1_id NUMBER        ,
        txt   VARCHAR2( 50 ),
        CONSTRAINT t1_pk PRIMARY KEY( t1_id )
    ) ;


    CREATE TABLE t2
    (
        t2_id NUMBER                      ,
        t1_id NUMBER                      ,
        price NUMBER( 10, 4 )             ,
        CONSTRAINT t2_pk PRIMARY KEY( t2_id ),
        CONSTRAINT t2_fk FOREIGN KEY( t1_id ) REFERENCES t1( t1_id )
    );

    insert into t1(t1_id, txt) values(1,'fit');
    insert into t1(t1_id, txt) values(2,'focus');
    insert into t1(t1_id, txt) values(3,'golf');
    insert into t1(t1_id, txt) values(4,'explorer');
    insert into t1(t1_id, txt) values(5,'corolla');

insert into t2(t2_id, t1_id, price) values(1,1,17000);
insert into t2(t2_id, t1_id, price) values(2,2,16000);
insert into t2(t2_id, t1_id, price) values(3,3,22000);
insert into t2(t2_id, t1_id, price) values(4,4,31000);
insert into t2(t2_id, t1_id, price) values(5,5,17000);


create view t1_view as select * from t1;
create view t2_view as select * from t2;
create view t_stacked_view as 
  select t1_view.txt ,
       t2_view.price ,
         t1_view.t1_id
    from t1_view 
          left join
          t2_view 
            on t1_view.t1_id = t2_view .t1_id
    ;   


--stacked view test
select t1_view.txt ,
       (select t_stacked_view.price 
            from t_stacked_view 
             where t1_view.t1_id = t_stacked_view .t1_id) price
    from t1_view ;

--or better yet, just drop the row level query
select t1_view.txt ,
       t2_view.price
    from t1_view 
          left join
          t2_view 
            on t1_view.t1_id = t2_view .t1_id
    ;

但这引出了一个问题，为什么要在这里进行行级查询？虽然 10g 应该对它们进行同样的优化，但我一直发现编写如下查询更容易，无论是为了可读性、可维护性，还是为了避免你遇到的错误（总是这样，3 年后，由应用程序（在数据库和调用应用程序中）你不能有一个会导致这个错误的条件？一个 rouge 语句进入并且你的整个应用程序死了？

    SELECT LV.PRICE,
            c.model_name
FROM LEDGER_VIEW LV
      LEFT /* OR INNER */ JOIN CARS C 
       ON C.MODEL_ID = LV.MODEL_ID
WHERE LV.PRICE < 500
于 2010-09-27T15:03:49.523 回答
1

我建议使用 RedFilter 的答案来检查是否有多个具有给定 MODEL_ID 的汽车。

如果您绝对确定 CARS.MODEL_ID 是唯一的，那么这意味着错误消息是通过从 LEDGER_VIEW 中选择生成的 - 因此请尝试在 CARS 上运行不带子查询的等效查询，如下所示：

SELECT LV.PRICE
FROM LEDGER_VIEW LV
WHERE LV.PRICE < 500

如果您仍然看到相同的错误（如果 CARS.MODEL_ID 是唯一的，您应该看到），您将需要调试 LEDGER_VIEW - 即。检查 LEDGER_VIEW 中返回多行的子查询及其所基于的底层视图。

在大多数形式的 SQL 中，基于视图创建视图是可能的，但这通常是一个坏主意——正因为如此。

于 2010-09-27T15:03:58.400 回答
0

尝试通过附加 rownum = 1 来强制您的子查询返回单个结果，如下所示：

SELECT LV.PRICE,
(SELECT C.MODEL_NAME FROM CARS C WHERE C.MODEL_ID = LV.MODEL_ID AND ROWNUM = 1) as MODEL_NAME
FROM LEDGER_VIEW LV
WHERE LV.PRICE < 500

它可能会起作用，如果确实如此，您将知道您的子查询返回多行，根据错误代码判断它应该是。当然，这不是解决方案，因此您可能必须修复汽车表中的数据才能真正解决问题。如果 model_id 再次重复，离开和 rownum = 1 将消除错误，防止您注意到问题。

于 2010-09-27T20:44:33.363 回答
0 
select
                                    a.account_number,
                                    a.party_id,
                                    a.TRX_NUMBER,
                                    a.trx_date,
                                    a.order_number,
                                    adv.unapplied_amt,
                                    a.Finance,
                                    a.customer_name,a.PARTY_NAME,
                                    a.customer_number,a.contact_number,
                                    a.name,
                                    a.Aging,
                                    a.transaction_type,
                                    a.exec_name,
                                    a.team_leader,
                                    sum(a.O_SAmount),
                                    (case when (trunc(sysdate) - trunc(a.trx_date)) <=:ag1 then sum(a.O_SAmount) else 0 end ) bucket1,--"<" || :ag1,
                                    (case when (trunc(sysdate) - trunc(a.trx_date)) between :ag1+1 and :ag2 then sum(a.O_SAmount) else 0 end ) bucket2,--:ag1+1 || "to" || :ag2,
                                    (case when (trunc(sysdate) - trunc(a.trx_date)) between :ag2+1 and :ag3 then sum(a.O_SAmount) else 0 end ) bucket3,--:ag2+1 || "to" || :ag3,
                                    (case when (trunc(sysdate) - trunc(a.trx_date)) >:ag3 then sum(a.O_SAmount) else 0 end ) bucket4,
                                    :AS_ON_date
from
(select distinct hca.account_number,hp.party_id,--rcta.CUSTOMER_TRX_ID,
--rcta.trx_number,rcta.trx_date,apsa.due_date,
(
select distinct
                            --ooha.order_number,
                            rcta.trx_number
                            --to_char(rcta.trx_date,'DD-MON-YYYY') trx_date
from                            
                            ra_customer_trx_all rcta,
                            oe_order_headers_all ooh,
                            oe_order_lines_all oola,
                            --ra_customer_trx_all rcta,
                            ra_customer_trx_lines_all rctla,
                            ra_cust_trx_types_all rctta
                            --ra_customer_trx_lines_all rctl
where 1=1
                AND ooh.header_id = oola.header_id
                   --AND ooh.order_number = '111111010101698'
                   AND ooh.order_number=oohA.order_number
                   AND TO_CHAR (ooh.order_number) = rcta.ct_reference
                   AND rcta.customer_trx_id = rctla.customer_trx_id
                   AND rctla.inventory_item_id = oola.inventory_item_id
                   and rcta.CUST_TRX_TYPE_ID = rctta.cust_trx_type_id
                   and rcta.org_id = rctta.org_id
                   and rctta.type like 'INV'
                   and oola.ordered_item LIKE 'MV%' 
                   AND oola.attribute3 = 'Y'
                   AND ooh.flow_status_code <> 'ENTERED'
                   AND oola.flow_status_code <> 'CANCELLED'
)TRX_NUMBER,
(select distinct
--ooha.order_number,
--rcta.trx_number
rcta.trx_date
from
            ra_customer_trx_all rcta,
            oe_order_headers_all ooh,
            oe_order_lines_all oola,
            --ra_customer_trx_all rcta,
            ra_customer_trx_lines_all rctla,
            ra_cust_trx_types_all rctta
            --ra_customer_trx_lines_all rctl
where 1=1
               AND ooh.header_id = oola.header_id
               --AND ooh.order_number = '111111010101698'
               AND ooh.order_number=oohA.order_number
               AND TO_CHAR (ooh.order_number) = rcta.ct_reference
               AND rcta.customer_trx_id = rctla.customer_trx_id
               AND rctla.inventory_item_id = oola.inventory_item_id
               and rcta.CUST_TRX_TYPE_ID = rctta.cust_trx_type_id
               and rcta.org_id = rctta.org_id
               and rctta.type like 'INV'
               and oola.ordered_item LIKE 'MV%' 
               AND oola.attribute3 = 'Y'
               AND ooh.flow_status_code <> 'ENTERED'
               AND oola.flow_status_code <> 'CANCELLED'
)TRX_Date,
rcta.INTERFACE_HEADER_ATTRIBUTE1 order_number,
ooha.attribute10 Finance,
f.customer_name,HP.PARTY_NAME,
TO_NUMBER(f.customer_number)customer_number,hp.primary_phone_number contact_number,--csi.incident_number,
--cii.instance_number,
haou.name,
--sum(acr.amount) Advance,--rcta.CUST_TRX_TYPE_ID,--acr.cash_receipt_id,
--sum(abs((apsa.AMOUNT_DUE_REMAINING-nvl(acr.amount,0)))) "O_SAmount",
apsa.AMOUNT_DUE_REMAINING O_SAmount,
--sum(abs((apsa.AMOUNT_DUE_REMAINING))) "O_SAmount",
round(months_between(sysdate,rcta.trx_date)*30) Aging,
--(case when ((round(months_between(sysdate,rcta.trx_date)*30)>=0) or (round(months_between(sysdate,rcta.trx_date)*30)<:aging1)) then apsa.AMOUNT_DUE_REMAINING end) "0 TO 30"
--(case when (trunc(sysdate) - trunc(apsa.Due_Date)) <=:ag1 then apsa.AMOUNT_DUE_REMAINING else 0 end ) bucket1,--"<" || :ag1,
--(case when (trunc(sysdate) - trunc(apsa.Due_Date)) between :ag1+1 and :ag2 then apsa.AMOUNT_DUE_REMAINING else 0 end ) bucket2,--:ag1+1 || "to" || :ag2,
--(case when (trunc(sysdate) - trunc(apsa.Due_Date)) between :ag2+1 and :ag3 then apsa.AMOUNT_DUE_REMAINING else 0 end ) bucket3,--:ag2+1 || "to" || :ag3,
--(case when (trunc(sysdate) - trunc(apsa.Due_Date)) >:ag3 then apsa.AMOUNT_DUE_REMAINING else 0 end ) bucket4,
--apsa.amount_due_original,
--TO_NUMBER(apsa.AMOUNT_DUE_REMAINING)AMOUNT_DUE_REMAINING,
rctta.name transaction_type,
PAPF.full_name||'-'||PAPF.EMPLOYEE_NUMBER exec_name,
ooha.attribute9 team_leader,
:AS_ON_date
from                    ra_customer_trx_all rcta,
                        oe_order_headers_all ooha,
                        hz_cust_accounts hca,
                        hz_parties hp,
                        --cs_incidents_all_b csi,
                        --csi_item_instances cii,
                        hr_all_organization_units haou,
                        ar_cash_receipts_all acr,
                        ar_receivable_applications_all aaa,
                        ra_cust_trx_types_all RCTTA,
                        hr.per_all_people_f papf,
                        ar_customers f,
                        ar_payment_schedules_all apsa,
                        jtf.JTF_RS_SALESREPS jrs
where 1=1
                        --and INTERFACE_HEADER_ATTRIBUTE1 like '111111060100538'
                        --and INTERFACE_HEADER_ATTRIBUTE1 like '111111010105402'
                        --and INTERFACE_HEADER_ATTRIBUTE1 like '111111010102791'
                        and rcta.ct_reference(+)=TO_CHAR(ooha.order_number)
                        AND f.customer_id = (rcta.bill_to_customer_id) 
                        and f.customer_id=hca.cust_account_id
                        and hca.party_id=hp.party_id
                        and haou.organization_id=rcta.INTERFACE_HEADER_ATTRIBUTE10
                        --and hp.party_id=cii.owner_party_id
                        --and csi.inventory_item_id=cii.inventory_item_id
                        --and csi.inv_organization_id=haou.organization_id
                        --and haou.organization_id=nvl(:location,haou.organization_id)
                        and ooha.SHIP_FROM_ORG_ID=nvl(:location,haou.organization_id)
                        AND RCTTA.NAME like :transaction_type||'%'
                        --decode(:org_id,null,null,(select name from ar_cash_receipts_all where organization_id = :org_id)) ||'%')
                        and rcta.trx_date<=to_date(:AS_ON_date)
                        --AND RCTTA.NAME=NVL(:TRANS_TYPE,RCTTA.NAME)
                        and rcta.org_id=nvl(:org_id,rcta.org_id)
                        --and f.customer_name like 'VIKAS SATAV'
                        and aaa.applied_customer_trx_id(+)=rcta.customer_trx_id
                        and aaa.cash_receipt_id=acr.cash_receipt_id(+)
                        and rcta.status_trx like 'OP'
                        and rcta.CUST_TRX_TYPE_ID=rctta.CUST_TRX_TYPE_ID
                        and apsa.CUSTOMER_TRX_ID=rcta.CUSTOMER_TRX_ID
                        and TO_NUMBER(apsa.AMOUNT_DUE_REMAINING) >0
                        --and hp.party_id=papf.party_id(+)
                        and jrs.salesrep_id = ooha.SALESREP_ID
                        and jrs.ORG_ID = ooha.ORG_ID
                        and jrs.PERSON_ID = papf.PERSON_ID(+)
) a,
(
select
b.order_number,
sum(b.AMOUNT_APPLIED) unapplied_amt
from
                        (select distinct to_char(ooha.order_number) order_number,ara.* from 
                        oe_order_headers_all ooha,
                        oe_payments oe,
                        ar_receivable_applications_all ara
where                    1=1--ooha.order_number = :p_order_num
                        and oe.header_id=ooha.header_id
                        and ara.PAYMENT_SET_ID=oe.PAYMENT_SET_ID
                        and ara.DISPLAY='Y'
                        and (ara.STATUS like 'OTHER ACC' or ara.STATUS like 'UNAPP') --or ara.STATUS like 'ACC')
                        ) b
group by b.order_number
) adv
where                       adv.order_number(+)=a.order_number
group by                    a.account_number,
                            a.party_id,
                            a.TRX_NUMBER,
                            a.trx_date,
                            a.order_number,
                            adv.unapplied_amt,
                            a.Finance,
                            a.customer_name,a.PARTY_NAME,
                            a.customer_number,a.contact_number,
                            a.name,
                            a.Aging,
                            a.transaction_type,
                            a.exec_name,
                            a.team_leader
order by a.Aging desc
于 2014-07-05T04:40:23.473 回答