SQL & PL/SQL

I don't understand why these query with column time gives me error. I think concatenation string (||) doesn't like it.

Could you help me please?

SQL Error [1791] [42000]: ORA-01791: not a SELECTed expression

select distinct b.ty||';'||b.mem||';'||a.jjj||';'||a.time||';'||a.dc||';'||a.etim||';'||a.oid||';'||a.app||';'||
case when stat = 345 then 'valid'
    when stat = 5667 then 'INVALID'
    else to_char(stat)
        END ||';'||ext_sec/60||';'||a.gr||';'||a.ta
                   from runinfo_history a INNER JOIN def_job b
                                               on a.ta=b.parent_table
                                               inner join def_tables dt
                                               on a.dc = dt.dc
                                               and a.ta = dt.ta
                                               and a.dc = dt.dc
                                               and dt.id = b.id
                                               and a.jjj=b.job_name
                                               WHERE
                 to_char(time,'YYYYMMDD') = to_char(current_date,'YYYYMMDD')
                 and a.dc in ('SERVER') order by time DESC ;