Question

我正在尝试运行一个包含2个子查询的查询。我正试图创建一个名为“Delta Date＆＃39;从Date1中减去minDate（来自第二个查询）。请帮助，我不断收到错误＆＃39;子查询有太多列。＆＃39;

SELECT Date1,                   #first query
     (Date1 - minDate) as Delta Date
    UNIQUE_ID 
FROM    panel
    WHERE (lower(criteria) LIKE lower(\'%criteria1%\'))
    AND UNIQUE_ID IN (


SELECT  min(Date1) as minDate,          #second query
    UNIQUE_ID 
FROM    panel
    WHERE (lower(criteria) LIKE lower(\'%criteria2%\'))
    AND Amount < 10000
    AND UNIQUE_ID IN ( SELECT   UNIQUE_ID        #third query
                           FROM     panel
                           WHERE    file_date > \'9/30/2015\'
/* AND additional logic to filter member purchases */
                           GROUP BY UNIQUE_ID
                           HAVING   count(AMOUNT) > 1 )

GROUP BY UNIQUE_ID )

Answer 1

您标记为“#second query”的子查询返回minDate＆amp;唯一身份。这就是问题所在。

UNIQUE_ID IN（选择min（Date1）为minDate，UNIQUE_ID FROM ....

您需要将#second查询放在第一个查询的FROM子句中。

Answer 2

//Try this code function hi(){ //without parenthesis it is treated as a variable alert('without ()\n\n'+hi); return 6; } //with parenthesis it is executed as a function alert('With () \n'+ hi());子查询在此上下文中应该只有一列：

in

您的逻辑非常难以理解，我不确定修复语法会创建一个符合您需要的查询。

我认为你可以使用窗口功能来达到类似效果。我不确定究竟是什么逻辑，但它看起来像这样：

UNIQUE_ID IN (
    SELECT UNIQUE_ID 
    FROM panel
    WHERE (lower(criteria) LIKE lower(\'%criteria1%\')) AND
           UNIQUE_ID IN (SELECT UNIQUE_ID 
                         FROM  panel
                         WHERE (lower(criteria) LIKE lower(\'%criteria2%\')) AND
                               Amount < 10000 AND
                               UNIQUE_ID IN (SELECT UNIQUE_ID 
                                             FROM  panel
                                             WHERE file_date > \'9/30/2015\'
    /* AND additional logic to filter member purchases */
                               GROUP BY UNIQUE_ID
                               HAVING   count(AMOUNT) > 1
                              )
                         GROUP BY UNIQUE_ID
                        )
    )

SQL子查询：子查询有太多列

2 个答案: