MYSQL将另一张表中的值插入一列 [英] MYSQL Insert values from another table into one column
问题描述
我想使用mySQL将项目从一个表移动到另一个表.
I am wanting to move items from one table into another using mySQL.
这是我目前使用的:
INSERT INTO items_rooms (item_id, room_id,x,y,n)
SELECT id, room_id,x,y,z
FROM `items_phoenix`
这行得通,但是我想将多个值插入到一列中,而不是将每个值插入不同的列中.
This works, however I am wanting to insert multiple values into one column instead of each values in different columns.
例如:
在表items_rooms中,我希望将items_phoenix中的值x和y放在items_rooms中的一列中.
In table items_rooms, I would like values x and y from items_phoenix to be placed into one column in items_rooms.
如果x = 5且y = 2,我可以将其保存到items_rooms中吗:一栏:5.2,而不是每个值的不同栏?
If x = 5 and y = 2, can I save it into items_rooms like this: one column: 5.2 instead of different columns for each values?
抱歉,这很令人困惑!
推荐答案
您可以在SELECT列列表中使用表达式.只要选择列表中的列和目标表中的列在数量和数据类型上都匹配,就可以执行以下操作:
You can use expressions in your SELECT column-list. As long as the columns in the select-list and the columns in the destination table match in number and data type, you can do something like this:
INSERT INTO items_rooms (item_id, room_id, x_dot_y, n)
SELECT id, room_id, CONCAT(x,'.',y), z
FROM `items_phoenix`
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