Sql where，order by，having和groupby query

Question

我可以有一个示例“SELECT”查询，它由所有where，orderby，having和groupby子句组成......

解释会有帮助。

Answer 1

SELECT Customer, SUM(OrderPrice) FROM Orders WHERE Customer='tehlulz' OR Customer='Vijay' GROUP BY Customer HAVING SUM(OrderPrice)>1500 ORDER BY Customer 

要打破它一点：

WHERE：用于定义条件。

HAVING：被使用，因为WHERE关键字不能用于集合函数。

GROUP BY：集团的结果通过某些领域

ORDER BY：显示结果顺序（如价格从最大到最小）

Answer 2

汇总订单的客户端对于订购了超过$ 10,000从大到小客户今年提出：

SELECT ClientName, SUM(OrderTotal) AS OrderTotal 
FROM Orders 
WHERE OrderDate >= '2012-01-01' 
GROUP BY ClientName 
HAVING SUM(OrderTotal) > 10000 
ORDER BY SUM(OrderTotal) DESC