子查询2-查询所有价格大于平均价格的商品，并且按价格降序排序

//查询所有价格大于平均价格的商品，并且按价格降序排序
//假定平均价格：5845.10
SELECT * FROM tdb_goods WHERE goods_price > 5845.10 ORDER BY goods_price DESC;


-- 使用子查询来实现

SELECT  * FROM tdb_goods WHERE goods_price > (SELECT ROUND(AVG(goods_price),2)  AS  avg_price FROM tdb_goods)  ORDER BY  goods_price DESC;

知识点：
1、子查询语句：(SELECT ROUND(AVG(goods_price),2) AS avg_price FROM tdb_goods)
2、ORDER BY
3、DESC;
4、SELECT * FROM tdb_goods WHERE goods_price > avg_price
5、ROUND函数

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