0 
select (select sc_machid as ClinicID,
case
    when substring(sc_machid,1,3)='BB0' then 'Head Office' 
    WHEN substring(sc_machid,1,3)='BA0' THEN 'HeadOffice'
    when substring(sc_machid,1,3)='BA1' THEN 'Villiers'
    when substring(sc_machid,1,3)='BA2' then 'Imperial IDC'
    WHEN substring(sc_machid,1,3)='BA3' THEN 'Warden'
    WHEN substring(sc_machid,1,3)='BA4' THEN 'Harrismith'
    WHEN substring(sc_machid,1,3)='BA5' THEN 'Tugela'
    WHEN substring(sc_machid,1,3)='BA6' THEN 'MooiRiver'
    WHEN substring(sc_machid,1,3)='bad' THEN 'MooiRiver'
    WHEN substring(sc_machid,1,3)='BB0' THEN 'Port Elizabeth'
    WHEN substring(sc_machid,1,3)='BB1' THEN 'East London'
    when substring(sc_machid,1,3)='BB2' THEN 'Umthatha'
    when substring(sc_machid,1,3)='BB3' then 'Kokstad'
    WHEN substring(sc_machid,1,3)='BB4' THEN 'Marian Hill'
    WHEN substring(sc_machid,1,3)='BB5' THEN 'Zeerust'
    WHEN substring(sc_machid,1,3)='BC0' THEN 'Imperial SBD'
    WHEN substring(sc_machid,1,3)='BC1' THEN 'Imperial TSD'
    WHEN substring(sc_machid,1,3)='BC2' THEN 'Roodekop'
    WHEN substring(sc_machid,1,3)='BD0' THEN 'Ventersburg'
    WHEN substring(sc_machid,1,3)='BD1' THEN 'Colesburg'
    WHEN substring(sc_machid,1,3)='BD2' THEN 'Hanover'
    WHEN substring(sc_machid,1,3)='BD3' THEN 'Beaufort West'
    WHEN substring(sc_machid,1,3)='BD4' THEN 'Beit Bridge Border Post Musina'
    WHEN substring(sc_machid,1,3)='BD5' THEN 'Cape Town - Epping'
    WHEN substring(sc_machid,1,3)='BD7' THEN 'Komati Poort'
    end as ClinicName, count(TransactionType) as NumberOfFirstTimePatientVisits
    from sc_audit 
    where TransactionType = 'Insert Patient Record' 
    group by ClinicName)
as t1,
(
    select pat_id as PatientID,
    count(*) as NumberOfVisits,
    sc_clinicid as ClinicID,
    CASE
        WHEN sc_clinicid = 'BA0' THEN 'HeadOffice'
        when sc_clinicid = 'BA1' THEN 'Villiers'
        when sc_clinicid = 'BA2' then 'Imperial IDC'
        WHEN sc_clinicid = 'BA3' THEN 'Warden'
        WHEN sc_clinicid = 'BA4' THEN 'Harrismith'
        WHEN sc_clinicid = 'BA5' THEN 'Tugela'
        WHEN sc_clinicid = 'BA6' THEN 'MooiRiver'
        WHEN sc_clinicid = 'bad' THEN 'MooiRiver'
        WHEN sc_clinicid = 'BB0' THEN 'Port Elizabeth'
        WHEN sc_clinicid = 'BB1' THEN 'East London'
        when sc_clinicid = 'BB2' THEN 'Umthatha'
        when sc_clinicid = 'BB3' then 'Kokstad'
        WHEN sc_clinicid = 'BB4' THEN 'Marian Hill'
        WHEN sc_clinicid = 'BB5' THEN 'Zeerust'
        WHEN sc_clinicid = 'BC0' THEN 'Imperial SBD'
        WHEN sc_clinicid = 'BC1' THEN 'Imperial TSD'
        WHEN sc_clinicid = 'BC2' THEN 'Roodekop'
        WHEN sc_clinicid = 'BD0' THEN 'Ventersburg'
        WHEN sc_clinicid = 'BD1' THEN 'Colesburg'
        WHEN sc_clinicid = 'BD2' THEN 'Hanover'
        WHEN sc_clinicid = 'BD3' THEN 'Beaufort West'
        WHEN sc_clinicid = 'BD4' THEN 'Beit Bridge Border Post Musina'
        WHEN sc_clinicid = 'BD5' THEN 'Cape Town - Epping'
        WHEN sc_clinicid = 'BD7' THEN 'Komati Poort'
    end as ClinicName 
    from sc_queue 
    group by ClinicName
) 
as t2;

上記のクエリでは、次のようなエラーが表示されます

Operand should contain 1column(s)

私を助けてください、私は問題がどこにあるのか理解できないようです

4

3 に答える 3

0

サブクエリSELECT sc_machid as ClinicID, ...は 3 つの列 ( ClinicID、ClinicName、NumberOfFirstTimePatientVisits) を生成します。したがって、SELECT式の一部にすることはできません。FROM句の一部である必要があります。次のようにします。

SELECT t1.ClinicID, t1.ClinicName, t1.NumberOfFirstTimePatientVisits
FROM (SELECT sc_machid as ClinicID, ... ) as t1 ...

についても同様ですselect pat_id as PatientID,count(*) as NumberOfVisits ...。を使用してこれら2つを組み合わせます

SELECT
    t1.ClinicID, t1.ClinicName, t1.NumberOfFirstTimePatientVisits,
    t2.PatientID, t2.NumberOfVisits, t2.ClinicID, t2.ClinicName
FROM
    (
        SELECT
            sc_machid AS ClinicID,
            CASE
                WHEN SUBSTRING (sc_machid,1,3)='BB0' THEN 'Head Office'
                -- ...
            END AS ClinicName,
            COUNT(TransactionType) AS NumberOfFirstTimePatientVisits
        FROM sc_audit 
        WHERE TransactionType = 'Insert Patient Record' 
        GROUP BY ClinicName
    ) AS t1,
    (
        SELECT
            pat_id AS PatientID,
            count(*) AS NumberOfVisits,
            sc_clinicid AS ClinicID,
            CASE
                WHEN sc_clinicid = 'BA0' THEN 'HeadOffice'
                -- ...
            END AS ClinicName
        FROM sc_queue
    ) AS t2

サブクエリはSELECT、単一の列を持つ単一のレコードを返す場合にのみ、式の一部にすることができます。複数の列を持つ単一のレコードを返す場合、エラーが発生します

#1242 - サブクエリが複数の行を返す

于 2013-06-03T09:03:14.800 に答える