Question

我有一个表格，其中每个数据都有一个日期，它以两列，一年和一周的形式插入：

+------+------+-------+
| Week | Year | Value |
+------+------+-------+
| 1    | 2014 | 5     |
| 5    | 2014 | 23    |
| 6    | 2014 | 12    |
| 7    | 2014 | 43    |
| 8    | 2014 | 4     |
| 9    | 2014 | 2     |
| 26   | 2013 | 21    |
| 27   | 2013 | 17    |
| 28   | 2013 | 42    |
| 31   | 2013 | 5     |
| ...  | ...  | ..    |
+------+------+-------+

我需要一个查询来获取在两个日期（年，周）之间插入的数据。我猜它应该是两个查询的交集的替代方案，一个具有开始日期，第二个具有结束数据，但我无法使其工作。任何帮助或消化？

这是我的镜头，但MySql不支持INTERSECT：

(SELECT SUM(Duration), Week, Type, Year 
 FROM UP26rotordowntime 
 WHERE (Year>=2013) 
 AND (Week >=01) 
 GROUP BY Week)

INTERSECT

(SELECT SUM(Duration), Week, Type, Year 
 FROM UP26rotordowntime 
 WHERE (Year<=2014) 
 AND (Week <=14) 
 GROUP BY Week)

Answer 1

您可以在WHERE条件中放置简单逻辑，并为GROUP BY使用（年，周）对：

SELECT SUM(Duration), Week, Type, Year 
FROM UP26rotordowntime 
WHERE Year = 2005 AND Week >= 10
   OR Year BETWEEN 2006 AND 2013
   OR Year = 2014 AND Week <= 14
GROUP BY Year,Week

Answer 2

如果您有id，则查询非常简单：

SELECT SUM(Duration), Week, Type, Year FROM UP26rotordowntime 
WHERE ID IN (
  SELECT ID FROM UP26rotordowntime WHERE (Year>=2013) AND (Week >=01) )
OR ID IN (
  SELECT ID FROM UP26rotordowntime WHERE (Year<=2014) AND (Week <=14))
GROUP BY Week

这应该返回你需要的交叉点

两个MySql查询的交集

2 个答案: