Formatting an SQL numeric query result with an arbitrary number of decimal places

Question

I have a database table with these two columns:

• Amount: numeric (18,0)
• DecimalPlaces: numeric (18,0)

This table can store amounts in va

Answer 1

How about?

select 12345 amount, 2 decimalPlaces, substr( to_char( 12345 ), 1, length (to_char( 12345 ) ) - 2 ) || '.' || substr( to_char( 12345 ), -2 ) result from dual /

     amount decimalPlaces result
 ---------- ------------- ------
     12345              2 123.45