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以下結果由我創建了一個SELECT語句創建:SUBQUERY總結行
total date currency provider conversion_to_usd
170.0168890000 2012-01-01 AUD Telluride 1.06694
177.5532500000 2012-01-01 CAD Telluride 1.00030
33.1864000000 2012-01-01 NZD Telluride 0.82966
687.4900000000 2012-01-01 USD Telluride 1.00000
我怎麼會在這裏總結一下行銷售,例如170.016 * 1.066 + 177.55 * 1.00 .. 。
SELECT SUM(...) FROM <SELECT STATEMENT ABOVE> ?