SQL语法中，常用到分组和排序，下列SQL执行报错的是？
（A）select region， sum(price) as total_price from sale_detail group by 1；
（B）select region， sum(price) as total_price from sale_detail group by region；
（C）select region， price from sale_detail group by region；
（D）select region， sum(price) as total_price from sale_detail group by region order by total_price；
参考答案
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