Question

我不知道为什么查询中的第三个联合会没有给我返回结果。

当我使用第一个两个联合运行它时，它工作正常，当我添加第三个联合时，它给了我这个错误-

”由以下原因引起：Org.eclipse.birt.data.engine.odaconsumer.OdaDataException：无法获取结果集meta.org.eclipse.birt.report.data.oda.jdbc.JDBCException：SQL语句未返回ResultSet对象。SQL错误1：java.sql.SQLException：java.sql.SQLException：ORA-00923：在预期的“

中找不到FROM关键字”

我正在尝试在第三联合中增加一个具有该项目完成状态的列-特定项目未链接到限定词-

select innerpart.*,
  DECODE(INNERPART.cpnt_id,'26001', INNERPART.GRADE) as "MWOR Grade"
 FROM
(Select
s.stud_id as UserID,
s.fname,
s.mi,
s.lname,
trim(s.lName||', '||s.fName||' '||s.mi) "Full Name",
qq.cpnt_id,
QQ.CMPL_STAT_ID,
qq.compl_dte,
qq.qual_id,
Q.QUAL_TITLE "Qual Title" ,
Q.QUAL_DESC "Qual Description",
pkg_student.get_delm_stud_qual_stat_rmday (qq.stud_id, qq.qual_id, qq.qual_id_root) AS status_remday, 
null as grade   
null as compl_date
from pa_student s,
pa_stud_qual_cpnt qq,
pa_qual q

where s.stud_id = '01775154'
and S.STUD_ID = QQ.STUD_ID
and q.qual_id = QQ.QUAL_ID 
and (q.qual_id = 'ENG_CURR_SAFETY CERT'
or q.qual_id ='ENG_CURR_BOOK OF RULES'
or q.qual_id ='ENG_CURR_FALL PROTECTION BASEL'
or q.qual_id ='ENG_CURR_BRIDGE WORRKER RESCUE'
or q.qual_id ='ENG_BNSF_EI25'
or q.qual_id ='ENG_CURR_PTC'
or q.qual_id ='ENG_CURR_PTC TELECOM 220 RADI'
or q.qual_id ='ENG_CURR_BROKEN RAIL'
or q.qual_id ='ENG_SMITH_SYTEM_DRIVER_DIRECT'
or q.qual_id ='ENG_CURR_TRACK STABILITY'
or q.qual_id ='ENG_CURR_OPT_TRACK STABILITY'
or q.qual_id ='ENG_CURR_FRA TIER II'
or q.qual_id ='ENG_CURR_TIER III'
or q.qual_id ='ENG_CURR_TIER III CONTINUE ED')
and qq.compl_dte >='01-JAN-2018'
and qq.compl_dte <='31-DEC-2018'

UNION
Select
s.stud_id as UserID,
s.fname,
s.mi,
s.lname,
trim(s.lName||', '||s.fName||' '||s.mi) "Full Name",
qq.cpnt_id,
QQ.CMPL_STAT_ID,
qq.compl_dte,
qq.qual_id,
Q.QUAL_TITLE "Qual Title" ,
Q.QUAL_DESC "Qual Description",
pkg_student.get_delm_stud_qual_stat_rmday (qq.stud_id, qq.qual_id, qq.qual_id_root) AS status_remday,
e.grade AS grade
null as compl_date
 from pa_student s,
pa_stud_qual_cpnt qq,
pa_qual q,
PA_CPNT_EVTHST e
 where s.stud_id = '01775154'
and S.STUD_ID = QQ.STUD_ID
and q.qual_id = QQ.QUAL_ID 
and (q.qual_id = 'ENG_CURR_SAFETY CERT'
 or q.qual_id ='ENG_CURR_BOOK OF RULES'
 or q.qual_id ='ENG_CURR_FALL PROTECTION BASEL'
 or q.qual_id ='ENG_CURR_BRIDGE WORRKER RESCUE'
 or q.qual_id ='ENG_BNSF_EI25'
 or q.qual_id ='ENG_CURR_PTC'
 or q.qual_id ='ENG_CURR_PTC TELECOM 220 RADI'
 or q.qual_id ='ENG_CURR_BROKEN RAIL'
 or q.qual_id ='ENG_SMITH_SYTEM_DRIVER_DIRECT'
 or q.qual_id ='ENG_CURR_TRACK STABILITY'
 or q.qual_id ='ENG_CURR_OPT_TRACK STABILITY'
 or q.qual_id ='ENG_CURR_FRA TIER II'
 or q.qual_id ='ENG_CURR_TIER III'
 or q.qual_id ='ENG_CURR_TIER III CONTINUE ED')
AND e.stud_id             = s.stud_id
AND qq.cpnt_typ_id       = e.cpnt_typ_id
AND qq.cpnt_id           = e.cpnt_id
AND qq.rev_dte           = e.rev_dte
and qq.compl_dte >='01-JAN-2018'
and qq.compl_dte <='31-DEC-2018' 
 UNION
 Select
s.stud_id as UserID,
s.fname,
s.mi,
s.lname,
trim(s.lName||', '||s.fName||' '||s.mi) "Full Name",
null as qq.cpnt_id,
null as QQ.CMPL_STAT_ID,
null as qq.compl_dte,
null as qq.qual_id,
null as "Qual Title" ,
    null as "Qual Description",
null AS status_remday,
null AS grade
cpnt.compl_date as compl_date
  from pa_student s,
pa_stud_qual_cpnt qq,
pa_qual q,
PA_CPNT_EVTHST e,
PA_STUD_CPNT cpnt
 where s.stud_id = '01775154'
and (cpnt.cpnt_id = '56001' or cpnt.cpnt_id = '59001')
and S.STUD_ID = cpnt.STUD_ID
AND e.stud_id             = s.stud_id
AND cpnt.cpnt_typ_id       = e.cpnt_typ_id
AND cpnt.cpnt_id           = e.cpnt_id
AND cpnt.rev_dte           = e.rev_dte
and cpnt.compl_dte >='01-JAN-2018'
and cpnt.compl_dte <='31-DEC-2018'  
 ) innerpart    
Order by UserID

Answer 1

您有两个语法错误（都是同一种语法：SELECT列表中缺少逗号）。当你写类似

select column1 as alias1
       column2
from   table1

-注意语法错误，第一列及其SELECT中的别名后面没有逗号-Oracle希望在FROM之后看到关键字column1，而不是列名或还有什么。

因此，找到丢失的逗号，将其重新添加，然后看看会发生什么。顺便说一句，它们是三元组UNION的前两个成员，所以当您说“添加第三个成员”是导致错误的原因时，我不相信您。相反，我想，当您添加第三个成员时，您还向前两个成员的SELECT列表中添加了更多内容。

缺少逗号：第一个null as grade的{{1}}之后和第二个SELECT的{{1}}之后。

尝试添加第三个联合时返回错误

1 个答案: