Question

I have these two tables with the same structure but with different number of datas.

Table First
id INT
type INT

Table Second
id INT
type INT

I need to update the type of the table “FIRST” with the value Type of table “SECOND” and I try to execute this statment

update First set 
       type = (
select Second.type
 from First,
      Second
where First.id=Second.id
              )

But it doesn’t run.
Where I’ve mistaken?

Thanks for any suggestions.

Answer 1

Your syntax is incorrect. Try instead:

UPDATE First, Second
SET    First.type = Second.type
WHERE  First.id   = Second.id