Question

目前我有3个帐户使用相同的电子邮件地址，我想为按功能分组的同一个电子邮件地址提供哈希密钥。运行的sql语句是

UPDATE customers (
    SELECT customer_id, email, email_hash FROM customers GROUP BY email) AS t1
    SET email_hash='123' WHERE email='abc@abc.com'

当我运行此SQL查询时，我收到此错误。

#1064 - You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '(select customer_id, email, email_hash, email_reg_status from customers group by' at line 1

如何使用group by函数为同一个电子邮件地址插入相同的哈希键？

Answer 1

如果我理解你的正确性，你需要做的就是

update customers set email_hash='123' where email='abc@abc.com';

Answer 2

由于email_id对所有客户都相同;如果您在下面这样做，那么您的所有客户记录在email_hash

中将具有相同的值

update customers set email_hash='123' where email='abc@abc.com';

我认为至少您的customer_id字段是唯一的。在这种情况下，为什么不只是更新customer_id，这是唯一的，如下所示

UPDATE customers SET email_hash='123' WHERE customer_id=<some_id_value>

MySQL逐个错误地更新

2 个答案: