Question

表名 - sql server 2008中的航班

   date       name
2003/04/29  air_France
2003/04/05  Dale_avia 
2003/04/08  Dale_avia 
2003/04/08  Dale_avia 
2003/04/02  Dale_avia 
2003/04/05  Aeroflot  
2003/04/25  Aeroflot  
2003/04/01  Don_avia  
2003/04/01  Don_avia  
2003/04/01  Don_avia  
2003/04/13  Don_avia  
2003/04/13  Don_avia  
2003/04/13  Don_avia  
2003/04/14  Don_avia  
2003/04/14  Don_avia  
2003/04/01  Don_avia  
2005/11/04  British_AW
2005/11/07  British_AW
2005/11/07  British_AW
2005/11/09  British_AW

现在我尝试根据日期列过滤特定日期范围内的名称，我的意思是2003年第4个月的3集，日期在1到10之间，11到20日，21到30日......但我很难框架正确的查询

我想尝试下面的

name       | 1-10  | 11-20  | 21-30
---------------------------------- 
Don_avia   |   4   |   5    |  0 
Aeroflot   |   1   |   0    |  1

我无法以正确的方式进行正确的查询......

请帮助我..提前谢谢!!!!!!

Answer 1

SELECT
  name,  
  SUM(CASE WHEN DAY(date) BETWEEN 1 AND 10 THEN 1 ELSE 0 END) as "1-10",
  SUM(CASE WHEN DAY(date) BETWEEN 11 AND 20 THEN 1 ELSE 0 END) as "11-20",
  SUM(CASE WHEN DAY(date) BETWEEN 21 AND 30 THEN 1 ELSE 0 END) as "21-30"
FROM flights
GROUP BY name

在SQL Fiddle

上测试

Answer 2

SELECT DISTINCT 名，
（SELECT COUNT（name）FROM flights AS F1 WHERE F.name = F1.name AND DAY（Date）BETWEEN 1和10）AS“1-10”，（SELECT COUNT（name）FROM FROM AS F2 WHERE F.name = F2.name AND DAY（Date）BETWEEN 11 AND 20）AS“11-20”，（SELECT COUNT（name）FROM Flights AS F3 WHERE F.name = F3.name AND DAY（Date）BETWEEN 21和30）AS“21-30” 来自航班AS F

基于不同日期范围的类似数据的计数

2 个答案: