Я предоставлю вам несколько примеров команды MySQL UPDATE вместе с примерами кода. Вот некоторые распространенные методы:

1. Обновление одного столбца:

   UPDATE table_name
   SET column_name = new_value
   WHERE condition;

   Пример:

   UPDATE employees
   SET salary = 5000
   WHERE employee_id = 1;

2. Обновление нескольких столбцов:

   UPDATE table_name
   SET column1 = value1, column2 = value2, ...
   WHERE condition;

   Пример:

   UPDATE employees
   SET salary = 5000, department = 'IT'
   WHERE employee_id = 1;

3. Обновление с помощью подзапросов:

   UPDATE table_name
   SET column_name = (
      SELECT value
      FROM other_table
      WHERE condition
   )
   WHERE condition;

   Пример:

   UPDATE employees
   SET salary = (
      SELECT AVG(salary)
      FROM employees
      WHERE department = 'IT'
   )
   WHERE department = 'Finance';

4. Обновление с помощью объединений:

   UPDATE table_name1
   INNER JOIN table_name2 ON condition
   SET table_name1.column_name = new_value
   WHERE condition;

   Пример:

   UPDATE employees
   INNER JOIN departments ON employees.department_id = departments.department_id
   SET employees.salary = 5000
   WHERE departments.name = 'IT';

5. Обновление с помощью оператора CASE:

   UPDATE table_name
   SET column_name = CASE
      WHEN condition1 THEN value1
      WHEN condition2 THEN value2
      ...
      ELSE default_value
   END
   WHERE condition;

   Пример:

   UPDATE employees
   SET salary = CASE
      WHEN department = 'IT' THEN salary + 1000
      WHEN department = 'HR' THEN salary + 500
      ELSE salary
   END;