Question

我试图选择多个表，其中endDate或startDate落在一个范围内。

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';

为什么这项工作没有/有更好的方法吗？

Answer 1

一些事情

此3选择必须具有相同数量和类型的列

igAnalytics.php

where条件必须与正确的查询相关

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

选择日期范围之间的表的并集

1 个答案: