Mysql更新查询错误: Unknown Column in 'field list'

Question

我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:“字段列表”中存在未知列“t1.t2_ID”

我见过几个 fieldlist 错误解决方案，但没有一个真正对我有帮助。因此，任何帮助将不胜感激。

Answer 1

如果您想添加列，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/

然后您可以使用UPDATE来填充该字段