ORA-01427: 单行子查询 returns 多于一行 - 如何解决？

Question

我有一个查询，目的是输出具有 "PPC" 角色的所有电子邮件以及这些 PPC 所属的 "paygroups"。

有很多支付组。
每个 paygroup 可以有多个 PPCs。
每个 PPC 可能有一个 email address 1 and/or 和一个 email address 2。

当我使用测试 paygroup(BOX) 时查询工作正常，但是当我注释掉该行以查询所有 paygroups 到 return 的所有 PPCs所有 paygroups 我得到错误 "single-row subquery returns more than one row"。

SELECT
auth.paygroup,
per.NAME, 
per.email_address AS    "Personal email",
per.email_address2 AS   "Business email"

FROM ps_personal_data per 

INNER JOIN ps_ts_ee_auth auth 
ON auth.emplid=per.emplid

INNER JOIN PS_SMS_SUBSCRB_TBL SUB
ON SUB.SUBSCRIBER_ID = AUTH.PAYGROUP

WHERE 1=1    
 AND SUB.EFFDT = (SELECT max (SUB2.effdt) FROM PS_SMS_SUBSCRB_TBL SUB2 
   WHERE SUB.SUBSCRIBER_ID = SUB2.SUBSCRIBER_ID AND SUB.EFF_STATUS = 'A')  
 AND auth.user_name = (SELECT R1.USER_NAME FROM PS_TS_CONTACT_ROLE R1
                      WHERE 1=1
                      AND R1.contact_role = 'PPC'
                    --AND R1.paygroup = 'BOX' --commenting this line out causes the error. It works fine when line is active
                      AND R1.action_dt = (SELECT MAX (R2.action_dt) 
                                         FROM PS_TS_CONTACT_ROLE R2
                                         WHERE 1=1
                                         AND R1.paygroup = R2.paygroup
                                         AND R1.contact_role =                                   
                                         R2.contact_role))

Answer 1

SELECT
auth.paygroup,
per.NAME, 
per.email_address AS    "Personal email",
per.email_address2 AS   "Business email"

FROM ps_personal_data per 

INNER JOIN ps_ts_ee_auth auth 
ON auth.emplid=per.emplid

INNER JOIN PS_SMS_SUBSCRB_TBL SUB
ON SUB.SUBSCRIBER_ID = AUTH.PAYGROUP

WHERE 1=1    
 AND SUB.EFFDT = (SELECT max (SUB2.effdt) FROM PS_SMS_SUBSCRB_TBL SUB2 
   WHERE SUB.SUBSCRIBER_ID = SUB2.SUBSCRIBER_ID AND SUB.EFF_STATUS = 'A')  
 AND auth.user_name in (SELECT R1.USER_NAME FROM PS_TS_CONTACT_ROLE R1 -- Change = to in
                      WHERE 1=1
                      AND R1.contact_role = 'PPC'
                      AND R1.paygroup = 'BOX' --commenting this line out causes the error. It works fine when line is active
                      AND R1.action_dt = (SELECT MAX (R2.action_dt) 
                                         FROM PS_TS_CONTACT_ROLE R2
                                         WHERE 1=1
                                         AND R1.paygroup = R2.paygroup
                                         AND R1.contact_role =                                   
                                         R2.contact_role))

ORA-01427: 单行子查询 returns 多于一行 - 如何解决？

ORA-01427:single-row subquery returns more than one row - how to fix?

sql

oracle

subquery

ora-01427