爲什麼我不能從MySQL查詢中選擇*並進行選擇？運行某種原因，當

Question

SELECT (price_int * amount_int) AS depth_value, * FROM default_market_depth WHERE current=1 AND trade_type='ask' 

此錯誤。爲什麼會這樣？

Answer 1

查詢的其餘部分之前把.*

SELECT default_market_depth.*, (price_int * amount_int) AS depth_value FROM default_market_depth WHERE current=1 AND trade_type='ask'