Single SQL statement that does multiple column checks

Question

I have multiple sql statements (see below) that do value and format checking on different columns within the same table. I am trying to condense these checks into one SQL statement, anyone know how to do this?
select colx, coly, col1 from table1 where col1 not in ('A','B','C')
select colx, coly, col2 from table1 where col2 not in ('X','Y','Z')
etc
Note that I am looking for the value of the offending column (e,g col1 or col2) as the last of the three columns outputted,
Thanks in advance

Answer 1

Perhaps;
SQL> create table t (colx number, coly number, col1 varchar2(1),
   col2 varchar2(1), col3 varchar2(1), col4 varchar2(1))
Table created.
SQL> insert all
   into t values(1,1,'A','D','G','J')
   into t values(1,2,'*','D','G','J')
   into t values(1,3,'A','D','G','J')
   into t values(1,4,'A','*','G','J')
   into t values(1,5,'A','D','G','J')
   into t values(1,6,'A','D','*','J')
   into t values(1,7,'A','D','G','J')
   into t values(1,8,'_','-','/','*')
select * from dual
8 rows created.
SQL> select colx, coly,
   trim(regexp_replace('Col1' || col1,'(Col1)([^A|B|C])|(Col1)([A|B|C])', '\1 ') ||
        regexp_replace('Col2' || col2,'(Col2)([^D|E|F])|(Col2)([D|E|F])', '\1 ') ||
        regexp_replace('Col3' || col3,'(Col3)([^G|H|I])|(Col3)([G|H|I])', '\1 ') ||
        regexp_replace('Col4' || col4,'(Col4)([^J|K|L])|(Col4)([J|K|L])', '\1')) offending_column,
   trim(regexp_replace(col1,'([^A|B|C])|([A|B|C])', '\1 ') ||
        regexp_replace(col2,'([^D|E|F])|([D|E|F])', '\1 ') ||
        regexp_replace(col3,'([^G|H|I])|([G|H|I])', '\1 ') ||
        regexp_replace(col4,'([^J|K|L])|([J|K|L])', '\1')) offending_value
from t
where regexp_replace(col1||col2||col3||col4,
      '(A|B|C)(D|E|F)(G|H|I)(J|K|L)') is not null
      COLX       COLY OFFENDING_COLUMN     OFFENDING_VALUE    
         1          2 Col1                 *                  
         1          4 Col2                 *                  
         1          6 Col3                 *                  
         1          8 Col1 Col2 Col3 Col4  _ - / *            
4 rows selected.Message was edited by:
MScallion
Added offending_value
NOTE* this query only works on single character columns and requires modification for multi character columns