Mysql UPDATE Query error: Unknown Column in 'field list'

Question

我正在尝试使用以下查询添加新列：

UPDATE t1
INNER JOIN
    (SELECT
       t1.CID as t1_id,
       t2.id as t2_id
    FROM t3
    INNER JOIN t1 ON t3.CID = t1.CID
    INNER JOIN t4 ON t4.MID = t3.MID
    INNER JOIN t2 ON t2.serial = t4.Serial 
        AND t3.Time BETWEEN t2.Start_Time AND t2.End_Time) as sub
ON sub.t1_id = t1.CID
SET t1.t2_id = sub.t2_id

显示错误：Unknown column 't1.t2_ID' in 'field list'

我见过几个 fieldlist 错误解决方案，但其中 none 确实帮助了我。因此，我们将不胜感激。

Answer 1

如果要添加列，请使用 ALTER TABLE

ALTER TABLE table
ADD [COLUMN] column_name column_definition [FIRST|AFTER existing_column];

http://www.mysqltutorial.org/mysql-add-column/

然后你可以使用UPDATE填写那个字段

Mysql UPDATE Query error: Unknown Column in 'field list'

Mysql UPDATE Query error: Unknown Column in 'field list'

mysql

sequelpro