连接两个表中的字符串

Question

如何从一个表中获取名称到另一个表的meta_description中并将其添加到另一个字符串中？

两个表如下： 1. manufacturer_id (manufacturer_id, name) 2. manufacturer_description (manufacturer_id, meta_description)

设置/更新/替换？： 带有名称的meta_description并将字符串连接到名称，例如。 “产品”

结果示例：

meta_description = "Walmart products"

Answer 1

使用join更新，我在两个字符串之间添加了一个空格，但是如果您不需要它可以轻松删除。

UPDATE manufacturer_description  md
JOIN manufacturer_id mi ON md.manufacturer_id = mi.manufacturer_id
SET md.meta_description = CONCAT(md.meta_description,' ' ,mi.name)

Answer 2

update manufacturer_description d set d.manufacturer_description = d.manufacturer_description  ||
(select i.name from manufacturer_id i where i.manufacturer_id = d.manufacturer_id );

您可以尝试以下操作：