php - 如何从表销售中为用户选择所有数据

Question

示例 SQL 表：

ID | USER | AMOUNT_SALES | TOTAL
--------------------------------
1  | John | 1500         | 2000 
2  | John | 1400         | 3000  
3  | James| 1200         | 4000   
4  | John | 1100         | 5000   
5  | Anie | 1900         | 8000 

所以我想

SELECT * FROM table 

并使用 while 在 HTML 表上显示结果，但我不想重复用户。

我要创建的示例表：

User  | Amount Sales  | Total 
-----------------------------
John  | 4000          | 10000
James | 1200          | 4000
Anie  | 1900          | 8000

Answer 1

SELECT user, 
       sum(amount_sales) as sum_sales, 
       sum(total) as sum_totals
FROM table
group by user

Answer 2

SQL GROUP BY 语法 SELECT column_name, aggregate_function(column_name) FROM table_name WHERE column_name operator value GROUP BY column_name;

http://www.w3schools.com/sql/sql_groupby.asp

例如，选择用户，sum(amount) as sum from table group by user

Answer 3

按用户汇总总数和分组将满足您的需要：

SELECT user, SUM(amount_sales),SUM(total) FROM table GROUP BY user;