PostgreSQL 9.0.3 Documentation
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# 8.2. Monetary Types

The `money` type stores a currency amount with a fixed fractional precision; see Table 8-3. The fractional precision is determined by the database's lc_monetary setting. Input is accepted in a variety of formats, including integer and floating-point literals, as well as typical currency formatting, such as `'$1,000.00'`. Output is generally in the latter form but depends on the locale. Non-quoted numeric values can be converted to `money` by casting the numeric value to `text` and then `money`, for example:

    SELECT 1234::text::money;

There is no simple way of doing the reverse in a locale-independent manner, namely casting a `money` value to a numeric type. If you know the currency symbol and thousands separator you can use `regexp_replace()`:

    SELECT regexp_replace('52093.89'::money::text, '[$,]', '', 'g')::numeric;

Since the output of this data type is locale-sensitive, it might not work to load `money` data into a database that has a different setting of `lc_monetary`. To avoid problems, before restoring a dump into a new database make sure `lc_monetary` has the same or equivalent value as in the database that was dumped.

Table 8-3. Monetary Types

Name | Storage Size | Description | Range
--- | --- | --- | ---
money | 8 bytes | currency amount | -92233720368547758.08 to +92233720368547758.07

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