如何在单个 MySQL 查询中使用 GROUP BY、HAVING 和 ORDER BY 显示在特定范围内具有总和的记录?
mysqlmysqli database
首先我们创建一个表 −
mysql> create table DemoTable ( Id int NOT NULL AUTO_INCREMENT PRIMARY KEY, CustomerName varchar(20), ProductPrice int ); Query OK, 0 rows affected (0.70 sec)
使用 insert 命令在表中插入一些记录 −
mysql> insert into DemoTable(CustomerName,ProductPrice) values('Chris',600);
Query OK, 1 row affected (0.18 sec)
mysql> insert into DemoTable(CustomerName,ProductPrice) values('David',450);
Query OK, 1 row affected (0.09 sec)
mysql> insert into DemoTable(CustomerName,ProductPrice) values('Chris',980);
Query OK, 1 row affected (0.40 sec)
mysql> insert into DemoTable(CustomerName,ProductPrice) values('Mike',1200);
Query OK, 1 row affected (0.11 sec)
mysql> insert into DemoTable(CustomerName,ProductPrice) values('Chris',400);
Query OK, 1 row affected (0.11 sec)
mysql> insert into DemoTable(CustomerName,ProductPrice) values('David',1200);
Query OK, 1 row affected (0.20 sec)
使用 select 语句显示表中的所有记录 −
mysql> select *from DemoTable;
这将产生以下输出 −
+----+--------------+--------------+ | Id | CustomerName | ProductPrice | +----+--------------+--------------+ | 1 | Chris | 600 | | 2 | David | 450 | | 3 | Chris | 980 | | 4 | Mike | 1200 | | 5 | Chris | 400 | | 6 | David | 1200 | +----+--------------+--------------+ 6 rows in set (0.00 sec)
以下是显示特定范围的数字的查询 −
mysql> select CustomerName,sum(ProductPrice) AS Total_Price from DemoTable group by CustomerName having sum(ProductPrice) between 1600 and 2000 order by CustomerName DESC;
这将产生以下输出 −
+--------------+-------------+ | CustomerName | Total_Price | +--------------+-------------+ | David | 1650 | | Chris | 1980 | +--------------+-------------+ 2 rows in set (0.00 sec)
