Question

伙计，此查询出了什么问题，我在下面的DB2 LUW中遇到错误。

[42703] [-206]“ d.sales”在使用上下文中无效。SQLCODE = -206，SQLSTATE = 42703，DRIVER = 4.23.42 [56098] [-727]错误在隐式系统操作类型“ 2”期间发生。返回的错误信息包括SQLCODE“ -206”，SQLSTATE“ 42703”和消息令牌“ d.sales”。.SQLCODE = -727，SQLSTATE = 56098，DRIVER = 4.23.42

SELECT listagg(e.name,';'), e.address,d.sales
FROM emp e
JOIN (
    SELECT distinct sales, org
    FROM sales s
    JOIN address a ON S.ID = a.id
) d ON d.salesid = e.salesid

Answer 1

查看您的查询：

SELECT listagg(e.name,';'), e.address,d.sales
FROM emp e
JOIN (SELECT distinct sales, org  -- you need to add salesid to your columns set
         FROM sales s
         JOIN address a ON S.ID = a.id
) d ON d.salesid = e.salesid

您忘记在子查询salesid中选择d

您需要添加s.salesid或a.salesid

Answer 2

显然我做了一个不好的例子，因为我无法通过实际查询。我想你们都没错，它缺少专栏。

Db2中的嵌套连接

2 个答案: