将附加列添加到INNER JOIN SQL查询

Question

我有以下INNER JOIN查询，您可以在小提琴here中看到该操作。

SELECT b.*, c.date2 
FROM (
      SELECT a.work, a.amount, 
        COUNT(*) totalCount, 
        SUM(Amount) totalAmount 
      FROM tableName a 
      GROUP BY a.work, a.amount 
     ) b 
     INNER JOIN 
     (
      SELECT a.work, a.amount, DATE_FORMAT(Date,'%D %M %Y') date2, 
        date 
      FROM tableName a 
     ) c ON b.work = c.work and b.amount=c.amount 
ORDER BY b.work, b.totalCount, c.date 

我想补充另一塔，被称为“网址”的查询，在相同的方式，日期列的作品，即它在“URL”列返回不同值的每一行。您可以在小提琴here中找到包含新列的模式。我不知道如何调整查询以返回具有不同“url”值的额外列。我已经尝试了一些东西，但无法让它正常工作。

Answer 1

你可以试试这个...

 
    SELECT b.*, c.date2, c.url 
    FROM (
      SELECT a.work, a.amount, 
        COUNT(*) totalCount, 
        SUM(Amount) totalAmount 
      FROM tableName a 
      GROUP BY a.work, a.amount 
     ) b 
     INNER JOIN 
     (
      SELECT a.work, a.amount, DATE_FORMAT(Date,'%D %M %Y') date2, 
        date, url 
      FROM tableName a 
     ) c ON b.work = c.work and b.amount=c.amount 
    ORDER BY b.work, b.totalCount, c.date 

Answer 2

它可以在较短的类似

SELECT a.work, a.amount, 
        COUNT(*) totalCount, 
        SUM(Amount) totalAmount, url, DATE_FORMAT(Date,'%D %M %Y') 
      FROM tableName a 
      GROUP BY a.work, a.amount, DATE_FORMAT(Date,'%D %M %Y')