Update table with values from another table - mysql

Question

I have an account and customer tables which can be linked by customer col and get the date col to the account table.

account table :

customer table :

final table :

If I use the below query, I am getting following error

ERROR: more than one row returned by a subquery used as an expression

What am I doing wrong?

UPDATE account
SET date = (
SELECT date
FROM customer
WHERE customer.customer = account.customer
);

Answer 1

Consider the update... join... set syntax:

update account a
inner join customer c on a.customer = c.custom
set a.date = c.date