mysql - 错误 1064：在 mysql 工作台中使用列和数字更新表

Question

我需要update一个带有2值的表，其中一个是另一个表的列，第二个是数字（constant 1），这是我的代码：

insert into table (col1, col2)
select colA from table2, '1' 
 where DATA_FORMAT(table2.created_at, '%y %m %d') = DATA_FORMAT(Now(), '%y %m %d');

错误信息是：

Error Code: 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 ''0', '1', '1'  where DATA_FORMAT(newsletter.created_at, '%y %m %d') = DATA_FORMA' at line 2

Answer 1

试试这个：

insert into table (col1, col2)
select colA, '1' as ColB from table2
where DATE_FORMAT(table2.created_at, '%y %m %d') = DATE_FORMAT(Now(), '%y %m %d');