Postgres Group By Issues

Question

大家好日子，我想在我的查询中提出这个问题。当按功能分组使用解密功能时会出现这个问题。

SELECT decrypt(a.email_address, 'secret', 'aes') AS email_address, 
       decrypt(atx.account_description, 'secret', 'aes') AS account_description,
       a.account_id, a.account_type_id 
    FROM account_type AS atx 
    INNER JOIN accounts AS a ON atx.account_type_id=a.account_type_id 
    GROUP BY email_address

表格字段是：

Account_type <- table names
account_type_id - INT
account_description - BYTEA

Accounts <- table names
account_id - INT
account_type_id - INT
email_address - BYTEA

错误显示此文件

ERROR:  column "atx.account_description" must appear in the GROUP BY clause or be used in an aggregate function
LINE 1: SELECT decrypt(atx.account_description, 'secret', 'aes') AS ...

我在GROUP BY上做错了吗？请注意。

但是当你在MYSQL上查询这样的东西时没有遇到任何问题。至于postgres是严格的方式。我很抱歉我还是postgres的新手。这是我第一次见到。我在新系统上使用postgres。

Answer 1

像这样更改您的查询

SELECT decrypt(a.email_address, 'secret', 'aes') AS email_address, 
decrypt(atx.account_description, 'secret', 'aes') AS account_description,
a.account_id, a.account_type_id 
FROM account_type AS atx 
INNER JOIN accounts AS a ON atx.account_type_id=a.account_type_id 
GROUP BY email_address,atx.account_description,a.account_id,a.account_type_id

您必须在选择列表中指定哪些列不包含agg。功能列