SQL查询通过消除选定值将2列合并为1列

Question

I have a data like this:

How to merge the columns into one column without 110? Like this:

Answer 1

Simply use case . For your data, this seems to work:

select name,
       (case when credit_code = 110 then debit_code else credit_code end)
from t;

If both could be 110 , then you would want:

select name,
       (case when credit_code <> 110 then credit_code
             when debit_code <> 110 then debit_code
        end) as code
from t;