Question

我进行查询，我认为它的语法正确：

  SELECT a1.androidPackage, a1.country, a1.revenueRate as old_CPI, 
         a2.revenueRate as new_CPI 
  FROM ad_appnext a1 
  WHERE  DATE(date_created) = CURDATE() AND country = 'UK' 
    INNER JOIN 
        (SELECT * 
            FROM ad_appnext 
            WHERE  DATE(date_created) = '2014-04-02' AND country = 'UK') a2 
        ON a1.androidPackage = a2.androidPackage 
    WHERE a1.revenueRate != a2.revenueRate;

但是当我运行时显示问题：

错误1064（42000）：您的SQL语法有错误;检查手册，对应右边的MySQL服务器版本在＆JONER ININ JOIN附近使用的语法（SELECT * FROM ad_appnext WHERE DATE（date_created）=＆＃39; 2014-04-02＆＃39; AN＆＃39;在第1行

请帮我解决这个问题。

Answer 1

您有两个WHERE子句。你应该只有一个，它应该在FROM子句之后。

SELECT a1.androidPackage, a1.country, a1.revenueRate as old_CPI, a2.revenueRate as new_CPI FROM ad_appnext a1 
INNER JOIN (SELECT * FROM ad_appnext WHERE DATE(date_created) = '2014-04-02' AND country = 'UK') a2 ON a1.androidPackage = a2.androidPackage 
WHERE a1.revenueRate != a2.revenueRate"
AND DATE(date_created) = CURDATE() AND country = 'UK'

Answer 2

您有两个WHERE子句

试试这个

SELECT a1.androidPackage, a1.country, a1.revenueRate as old_CPI, 
         a2.revenueRate as new_CPI 
  FROM ad_appnext a1 

    INNER JOIN 
        (SELECT * 
            FROM ad_appnext 
            WHERE  DATE(date_created) = '2014-04-02' AND country = 'UK') a2 
        ON a1.androidPackage = a2.androidPackage 
    WHERE  DATE(date_created = CURDATE() AND country = 'UK' 
        and a1.revenueRate != a2.revenueRate;

Mysql语法问题

2 个答案: