mysql update where select from another table code example

Example 1: mysql update table from select on another table

UPDATE TableB 
SET TableB.value = (
    SELECT TableA.value 
    FROM TableA
    WHERE TableA.name = TableB.name
);

Example 2: mysql select update same table

UPDATE
    products_description pd INNER JOIN products_description pd2 ON
    (pd.products_id=pd2.products_id AND pd2.language_id=1 AND pd.language_id<>1)
SET pd.products_seo = pd2.products_seo;