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> Or if your language has something specific built in, use that.

Unless your language is PostgreSQL's dialect of SQL, apparently. https://wiki.postgresql.org/wiki/Don%27t_Do_This#Don.27t_use...

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It has the same issue that the other suggestion of your parent comment had: it can’t deal with fractions of cents, which is an issue you will most likely run into before you will into floating point rounding issues.

Of course for databases you should use a decimal.

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