各位大神好, 第一题我怎么都跑不过 代码如下 能问问跑出来的大神们要怎么写呢...那个精度我给跪了,不知道怎么搞出来,ROUND()也不行,cast也不行 select cast(avg_price as NUMERIC(10,4)) as avg_price,n.NAME as name from ( select avg(Price)avg_price,m.NAME as name from Products p left join Manufacturers m on m.CODE=p.Manufacturer group by m.CODE,m.NAME ha...