我试图只选择那些评分超过 8.5 的演员,但是出现错误,说 minrating 列不存在。如果我删除 where 子句,那么它会起作用,但是我会得到任何评分,而不是那些 onl
select name, min(rating) as minrating
from actors
where minrating >8.5
group by name
答案 0 :(得分:0)
WHERE
子句应该是一个 HAVING
子句:
SELECT name, MIN(rating) AS minrating
FROM actors
GROUP BY name
HAVING MIN(rating) > 8.5
注意你定义的列别名不能用在HAVING
子句上,所以我们需要重复MIN
表达式。