How can I pass/add these results in my Main query's column

Hello Experts
I’m working on a subquery. My subquery works fine and give the results what I need. But how can I pass/add these results in my Main query’s column ‘MGRNAME’. Here is my query
select pc.c_id "Project ID",
cn.c_id "Client ID", cn.c_last "Last Name", cn.c_first "First Name",
pj.mgr_id "Manager ID", pj.project_name "Project", MGRNAME
from project_consultant pc
join consultant cn
on (pc.c_id = cn.c_id)
join project pj
on (pc.p_id = pj.p_id)
where lower(cn.c_last) = 'myers'
and MGRNAME in
( select concat (substr(c_last,1,20),
substr(c_first,1,20))
as MGRNAME from consultant
where c_id in (102, 103)
When I run the above query I got error.
Thanks a lot on advance

I’ve join three tables to get the information about I need. I got everything working expert one part. The subquery
( select concat (substr(c_last,1,20),
substr(c_first,1,20))
as MGRNAME from consultant
where c_id in (102, 103)
Gives me the names of employees I need. The output comes 2 names. I’m trying to add these 2 names in my main query and show the results but I got the following error
Error at Command Line:11 Column:4
Error report:
SQL Error: ORA-00904: "MGRNAME": invalid identifier
00904. 00000 - "%s: invalid identifier"
*Cause:
I can understand there is something wrong with MGRNAME field but not sure what it is. Can somebody point it out?
Once again this is main query with single sub query
select pc.c_id "Project ID",
cn.c_id "Client ID", cn.c_last "Last Name", cn.c_first "First Name",
pj.mgr_id "Manager ID", pj.project_name "Project",
MGRNAME
from project_consultant pc
join consultant cn
on (pc.c_id = cn.c_id)
join project pj
on (pc.p_id = pj.p_id)
where lower(cn.c_last) = 'myers'
and MGRNAME in
( select concat (substr(c_last,1,20),
substr(c_first,1,20))
as MGRNAME from consultant
where c_id in (102, 103)
Hope it helps

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