mysql - 选择日期范围之间的表并集

Question

我尝试选择多个表，其中结束日期或开始日期不在范围内。

SELECT *
FROM excel.construction
GROUP BY startDate,
         endDate
UNION ALL

SELECT *
FROM excel.misc
GROUP BY startDate,
         endDate
UNION ALL

SELECT *
FROM excel.spawar
GROUP BY startDate,
         endDate
WHERE construction.startDate BETWEEN '2012-01-01' AND '2012-01-10'
  OR construction.endDate BETWEEN '2012-01-01' AND '2012-01-10'
  OR misc.startDate BETWEEN '2012-01-01' AND '2012-01-10'
  OR misc.endDate BETWEEN '2012-01-01' AND '2012-01-10';

为什么这不起作用/有更好的方法吗？

Answer 1

一些事情

这 3 个选择必须具有相同的列数和类型

SELECT * FROM excel.construction  
SELECT * FROM excel.misc 
SELECT * FROM excel.spawar 

where 条件必须与正确的查询相关

SELECT * 
    FROM excel.construction 
    where construction.startDate  BETWEEN '2012-01-01' AND '2012-01-10' 
    OR construction.endDate BETWEEN '2012-01-01' AND '2012-01-10'
    group by startDate,endDate
UNION ALL 
select * 
    FROM excel.misc 
    where misc.startDate BETWEEN '2012-01-01' AND '2012-01-10' OR 
         misc.endDate BETWEEN '2012-01-01' AND '2012-01-10';m       
    group by  startDate, endDate 
UNION ALL 
select * 
    from excel.spawar 
group by startDate, endDate