Update a table with join?

Question

I am trying to update table A with data from table B. I thought I can do something like this

update A 
set A.DISCOUNT = 3 
from INVOICE_ITEMS A
join ITEM_PRI         


        

Answer 1

You might be getting error because of the FROM clause .You can do it without using FROM clause. Here is an example :

    UPDATE customer_table c 

      JOIN  
          employee_table e
          ON c.city_id = e.city_id  
      JOIN 
          anyother_ table a
          ON a.someID = e.someID

    SET c.active = "Yes"

    WHERE c.city = "New york";