Question

If my column has John1, John, Jo1hn, 1John..I must write a query which extracts only John i.e. no numeric digits at any place.

I already tried multiple options with regexp_like and below query came close

select * from table where  regexp_like(column,'[^[:digit:]]+$');

But it is only eliminating John1 which has 1 as the last character, not the others.

Let me know if the question is not clear. Thanks in advance!

Answer 1

Let’s try this way:

SQL> with t1(col) as(
  2    select 'John1' from dual union all
  3    select 'John'  from dual union all
  4    select 'Jo1hn'  from dual union all
  5    select '1John' from dual
  6  )
  7  select *
  8    from t1
  9  where regexp_like(col, '^[^[:digit:]]+$')
 10  ;

COL
-----
John

OR

SQL> with t1(col) as(
  2    select 'John1' from dual union all
  3    select 'John'  from dual union all
  4    select 'Jo1hn'  from dual union all
  5    select '1John' from dual
  6  )
  7  select *
  8    from t1
  9  where regexp_like(col, '^[[:alpha:]]+$')
 10  ;

COL
-----
John