将一行复制到同一个表中的另一列

Question

表中CUSTOMERS的值由唯一ID值识别，此表中的所有记录也都有CONSENT布尔属性。

我需要将CONSENT值复制到CONSENT2布尔字段以获取相同的记录。

据我所知，此服务器上禁用了几个SQL命令。

这会有用吗？

UPDATE
    CUSTOMERS
SET
    CUSTOMERS_A.CONSENT_Email = CUSTOMERS_A.CONSENT_Email2
    CUSTOMERS_A.CONSENT_Phone = CUSTOMERS_A.CONSENT_Phone2
FROM
    CUSTOMERS AS CUSTOMERS_A
    INNER JOIN CUSTOMERS AS CUSTOMERS_B
        ON CUSTOMERS_A.id = CUSTOMERS_B.id

Answer 1

你可以不加入

UPDATE
CUSTOMERS
   SET CONSENT_Email = CONSENT_Email2,
       CONSENT_Phone = CONSENT_Phone2

Answer 2

您可以简单地使用，在真正需要之前不要添加额外的连接/条件。

UPDATE CUSTOMERS
   SET (CONSENT_Email2,CONSENT_Phone2) = (CONSENT_Email,CONSENT_Phone);

它会将两列的CONSENT2值复制到CONSENT中。

i.e. CONSENT >>> CONSENT2