请问一下下面这行代码可以怎么修改呢 一直报错Syntax Error: [line #1] Two objects in an expression must be connected by an operator. Object 1: first(full_price_close) Object 2: -1
tbReturn20Day = select bond_code,(last(full_price_close)/first(full_price_close) -1) as 20tradingday_return from tbReturn20Day group by bond_code
