mysql - 为什么我不能从 MySQL 查询中乘以 AND select *？

Question

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

由于某种原因运行时出现此错误。为什么会这样？

Answer 1

将.*查询的其余部分放在前面

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