我正在尝试根据另一个表中的属性值编写一个表的更新查询。

Question

thus far I have

UPDATE dbo.Demographics
SET MAIL_MAG = 0
Inner Join dbo.Name
On Demographics.ID=dbo.Name.ID
Where dbo.Name STATUS = 'CON'

What I am unsure is if I have to have the inner join and if I am doing it correctly. I know that the attribute in both tables is ID.

Also do I have to use "dbo."

Answer 1

This is the syntax for updating a table with a JOIN in SQL Server.

You also should use aliases for tables. For the Demographics table I have used d , for the Name table I have used n .

You do not need to use dbo in your update statement.

UPDATE d
SET d.MAIL_MAG = 0
FROM Demographics d 
INNER JOIN Name n On n.ID = d.ID
WHERE 
n.STATUS = 'CON'