DB2选择多行到

Question

一行

我有以下几点：

UserID | Number 
1 | 100 
1 | 200 
1 | 300 
2 | 20 
2 | 21 
2 | 22 
3 | 333 
...... 
..... 
1000| 23 
....... 

and I want to get the following result: 
UserID | Average 
1 | 200 
2 | 21 
3 | 300 
...... 
...... 
1000 | 200 
...... 

的值只是为了得到什么我谈论的想法！ 提前谢谢！

Answer 1

SELECT UserID, AVG(Number) AS Average 
FROM YourTable 
GROUP BY UserID 

Answer 2

使用AVG合计：

SELECT UserId, AVG(Number) 
FROM YourTable 
GROUP By UserId 

SQL Fiddle Demo