add record in SQL based on last character of a field

Question

I have a field in sql that contains a 1 or 0 at the end. What I am trying to do is if the field has a 1 at the end but no corresponding 0 I would like to add that record.

3 different examples

Field value

• Data1 ( I would like to add another record containing Data0)

• Data0 ( I would like to add another record containing Data1)

• Data0 and Data1 both exists in table ( Do nothing )

Answer 1

insert into test(col, another_column_1,...,another_column_n)
select substr(col,1, length(col)-1) ||   --this is the base value
        max(mod(substr(col,length(col),length(col))+1,2)) --this is the termination (0 or 1)
        as col ,
        max(another_column_1),
        ...
        max(another_column_n)
from test
where substr(col,length(col),length(col)) between '0' and '1'
group by substr(col,1, length(col)-1)
having count(*)=1;

you can see test here

Updated for Oracle

Answer 2

If I understood your question correctly, you can use the LIKE operator.

You can do something like:

(field like '%1' or field like '%0') and not field like '%0%1'

But generally, SQL is not suitable for text processing. This LIKE thing is pretty much the most advanced text processing feature in SQL.