将字符转换为SQL Oracle中的十进制/双精度字符

Question

Can anyone help me to for below coding, how to convert String to Decimal/Double.

I have received the following error when running these code.

"Invalid character found in a character string argument of the function "DECFLOAT"

(case when
(select max(IT.TRACE_QUANTITY) from BRDB.IMPORT_TRACE IT where IT.FILE_NO = IS.FILE_NO and IT.TRACE_TYPE = 'CO' and IT.TRACE_UNIT = '40H') is null
then ''
else decimal('1.125')
end) as "40H"

the reason i convert it is to sum all the numbers i need. I want to convert '1.125' to double or decimal

Answer 1

Would TO_NUMBER (with appropriate format mask) help? For example:

SQL> select to_number('1.125', '99999D999', 'nls_numeric_characters = .,') result from dual;

    RESULT
----------
     1,125

SQL>

Answer 2

Just use 1.125 directly instead of else decimal('1.125') :

(case when
(select max(IT.TRACE_QUANTITY) from BRDB.IMPORT_TRACE IT where IT.FILE_NO =  IS.FILE_NO and IT.TRACE_TYPE = 'CO' and IT.TRACE_UNIT = '40H') is null
then ''
else 1.125
end) as "40H"