expression to update column based on other column sql

Question

Here are my tables .. I have table 1 and table2

I want an expression in SQL to update the price of car in table 1 if it is = 0 .. by set the price of the car same as the another product which has the same integer on ( Table2.N ). .. and the same date ( Table1.Date )

FOR EXAMPLE ON the figure ..

I want the car price be the same as house price on april ( date ) (I chose house because car and house has same record on ( Table2.N )

Answer 1

UPDATE Table1 SET Price = t.Price  
FROM  
       (  
          SELECT Price, N
          FROM Table2
          WHERE Product-N != 'Car'
       ) t  
WHERE (Table1.Product-N = 'Car' AND Table1.Price = 0 AND Table1.N = t.N AND Table1.Date = t.Date)