UPDATE t1
SET t1.COL1 = t2.COL1, t1.COL2 = t2.COL2
FROM MY_TABLE AS t1
JOIN MY_OTHER_TABLE AS t2 ON t1.COLID = t2.ID
WHERE t1.COL3 = 'OK';UPDATE table
SET column_1 = new_value_1,
column_2 = new_value_2
WHERE
search_condition
ORDER column_or_expression
LIMIT row_count OFFSET offset;UPDATE employees
SET hire_date = (SELECT departments.start_date
FROM departments
WHERE departments.department_id = employees.department_id
AND departments.department_name = 'HR')
WHERE EXISTS (SELECT *
FROM departments
WHERE departments.department_id = employees.department_id
AND departments.department_name ='HR');