oracle - Trouble performing a SQL insert using selects where more than 1 row is to be inserted -


i'm not strongest sql developer (kinda new) thought i'm trying do, i'm receiving error.

basically, i'm trying perform mass insert based on selects. value of first select in statement below returns 1 groupid, 2nd statement returns few hundred requestcategory id's. trying perform these few hundred inserts statement below:

insert m_grouprequestcategory (     groupid,     requestcategoryid ) values (     (select groupid esaws.m_group name = 'administration group'),     (select requestcategoryid esaws.m_grouprequestcategory groupid = (select groupid esaws.m_group name = 'customer service group')) );

my issue is, sql returning following error:

error report - sql error: ora-01427: single-row subquery returns more 1 row 01427. 00000 -  "single-row subquery returns more 1 row" *cause:     *action:

can please explain me i'm doing wrong, , need change working?

edit: clear, im trying come way not have write few hundred indivdual inserts.

i suspect want:

insert m_grouprequestcategory (     groupid,     requestcategoryid ) select      distinct g.groupid, r.requestcategoryid         esaws.m_group g cross join  esaws.m_grouprequestcategory r       g.name = 'administration group' ,         r.groupid = (                 select groupid                  esaws.m_group                  name = 'customer service group') , not exists(select * esaws.m_grouprequestcategory r2                 r2.groupid = g.groupid                ,    r2.requestcategoryid = r.requestcategoryid) ;

which copying of request categories 'customer service group' 'administration group', if understand correctly.


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