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I’m creating a financial app and it seems my floats in sqlite are floating around. Sometimes a 4.0 will be a 4.000009, and a 6.0 will be a 6.00006, things like that. How can I make these more exact and not affect my financial calculations?
Values are coming from Python if that matters. Not sure which area the messed up numbers are coming from.
This is a common problem using SQLite as it does not have a Currency type.
As S.Mark said you can use the Decimal representation library. However SQLite 3 only supports binary floating point numbers (sqlite type REAL) so you would have to store the Decimal encoded float as either TEXT or a BLOB or convert to REAL(but then you’d be back to a 64bit binary float)
So consider the range of numbers that you need to represent and whether you need to be able to perform calculations from within the Database.
You may be better off using a different DB which supports NUMERIC types e.g. MYSql, PostgreSQL, Firebird