我已经构造了如下的查询，当输入有限的一组输入时，其结果集被准确地返回，即，当输入500条记录时，查询结果带有标量全查询错误消息下方。
"Error: SQL0811N The result of a scalar fullselect, SELECT INTO statement, or VALUES INTO statement is more than one row. SQLSTATE=21000 (State:21000, Native Code: FFFFFCD5)"
但是，当同一组记录被拆分并输入时，即通过输入前100个记录然后输入下一个100依此类推，直到所有500条记录都被输入，那么查询工作正常，没有任何记录错误信息。我制定的查询如下。
select d.pol_id,
(select rtrim(a.CLI_INDV_TITL_TXT)||','||
rtrim(a.ENTR_SUR_NM)||','||
rtrim(a.CLI_INDV_MID_NM)||','||
rtrim(a.ENTR_GIV_NM)
from uding604.tclnm a
where a.co_id = 'CP'
and a.cli_id = d.cli_id) "Client Name",
(select RTRIM(a.CLI_ADDR_LN_1_TXT)||','||
RTRIM(a.CLI_ADDR_LN_2_TXT)||','||
RTRIM(a.CLI_ADDR_LN_3_TXT)||','||
RTRIM(a.CLI_ADDR_MUN_CD)||','||
RTRIM(a.CLI_ADDR_CNTY_CD)||','||
RTRIM(a.CLI_CITY_NM_TXT)||','||(select rtrim(etbl.etbl_desc_txt)
from uding604.tedit etbl
where etbl.co_id = 'CP'
and etbl.etbl_typ_id = 'STACD'
and etbl.etbl_valu_id = RTRIM(a.CLI_CRNT_LOC_CD))||','||
(case when rtrim(a.CLI_CTRY_CD) = 'IN'
then 'India'
else '' end)||','||
RTRIM(a.CLI_PSTL_CD)
from uding604.tclia a
where a.co_id = 'CP'
and a.cli_addr_typ_cd = 'PR'
and a.cli_id = d.cli_id) "Client Address",
coalesce((select RTRIM(a.CLI_CNTCT_ID_TXT)
from uding604.tclic a
where a.co_id = 'CP'
and a.CLI_CNTCT_ID_CD = 'CP'
and a.cli_id = d.cli_id),'') "Client Mobile",
coalesce((select RTRIM(a.CLI_CNTCT_ID_TXT)
from uding604.tclic a
where a.co_id = 'CP'
and a.CLI_CNTCT_ID_CD = 'EM'
and a.cli_id = d.cli_id),'') "Client Email",
(select pol.serv_agt_id
from uding604.tpol pol
where pol.co_id = 'CP'
and pol.pol_id = d.pol_id
and pol.serv_agt_id in (select agt_id
from uding604.tag
where co_id = 'CP'
and agt_stat_cd = 'A')
fetch first 1 row only) "Agent ID",
(select case
when ag.agt_stat_cd = 'A'
then 'ACTIVE'
else ''
end
from uding604.tag ag
where ag.co_id = 'CP'
and ag.agt_id in (select pol.serv_agt_id
from uding604.tpol pol
where pol.co_id = 'CP'
and pol.pol_id = d.pol_id)) "Agent Status",
(select rtrim(a.CLI_INDV_TITL_TXT)||' '||
rtrim(a.ENTR_SUR_NM)||' '||
rtrim(a.CLI_INDV_MID_NM)||' '||
rtrim(a.ENTR_GIV_NM)
from uding604.tclnm a
where a.co_id = 'CP'
and a.cli_id in (select pol.serv_agt_id
from uding604.tpol pol
where pol.co_id = 'CP'
and pol.pol_id = d.pol_id
and pol.serv_agt_id in (select agt_id
from uding604.tag
where co_id = 'CP'
and agt_stat_cd = 'A')
fetch first 1 row only)) "Advisor Name",
(coalesce((select RTRIM(a.CLI_CNTCT_ID_TXT)
from uding604.tclic a
where a.co_id = 'CP'
and a.CLI_CNTCT_ID_CD = 'CP'
and a.cli_id = (select pol.serv_agt_id
from uding604.tpol pol
where pol.co_id = 'CP'
and pol.pol_id = d.pol_id
and pol.serv_agt_id in (select agt_id
from uding604.tag
where co_id = 'CP'
and agt_stat_cd = 'A'))),'')) "Agent Mobile",
(coalesce((select RTRIM(a.CLI_CNTCT_ID_TXT)
from uding604.tclic a
where a.co_id = 'CP'
and a.CLI_CNTCT_ID_CD = 'EM'
and a.cli_id = (select pol.serv_agt_id
from uding604.tpol pol
where pol.co_id = 'CP'
and pol.pol_id = d.pol_id
and pol.serv_agt_id in (select agt_id
from uding604.tag
where co_id = 'CP'
and agt_stat_cd = 'A'))),''))"Agent Email",
(select etbl.etbl_desc_txt
from uding604.tedit etbl
where etbl.co_id = 'CP'
and etbl.etbl_typ_id = 'BRIND'
and etbl.etbl_valu_id in (select br_id
from uding604.tag
where co_id = 'CP'
and agt_stat_cd = 'A'
and agt_id in (select serv_agt_id
from uding604.tpol m
where m.co_id = 'CP'
and m.pol_id = d.pol_id))) "Advisor Branch Id"
from uding604.tpolc d
where d.co_id = 'CP'
and d.cli_id in (select pol_id from uding604.polid_tmp) --this subquery holds the records to be provided as input and currently the 'uding604.polid_tmp' table in the subquery holds 500 records
and d.pol_id in (select pol_id
from uding604.tpol
where co_id = 'CP'
and pol_cstat_Cd in ('1','4')
and pol_iss_eff_dt between '2008-09-26' and '2010-09-26')
and d.pol_id in (select max(a.pol_id)
from uding604.tpolc a
where a.co_id = 'CP'
and a.cli_id = d.cli_id)
and d.pol_cli_rel_typ_cd = 'O'
我觉得我非常接近解决方案，但它是什么？
答案 0 :(得分：3)
因为当您执行a.cli_id = (select pol.serv_agt_id之类的操作时，等号右侧的部分只能返回一行。
因此，当您添加其他数据时，从100行到500行，附加数据中的某些内容会导致这些子查询返回多个记录。您可以执行in而不是=，或者检查您的数据是否有重复项，或在where子句中添加其他限定符以过滤掉不需要的记录。