解决1093 - You can‘t specify target table报错问题及原因分析

-- 创建临时表
CREATE TEMPORARY TABLE temp_table AS
SELECT id
FROM your_table
WHERE some_condition;

-- 使用临时表进行更新
UPDATE your_table
SET column = new_value
WHERE id IN (SELECT id FROM temp_table);

-- 删除临时表
DROP TEMPORARY TABLE temp_table;

UPDATE your_table t1
JOIN (
    SELECT id
    FROM your_table
    WHERE some_condition
) t2 ON t1.id = t2.id
SET t1.column = new_value;

UPDATE your_table
SET column = new_value
WHERE EXISTS (
    SELECT 1
    FROM your_table t2
    WHERE t2.id = your_table.id
    AND some_condition
);

UPDATE employees
SET salary = 5000
WHERE department_id IN (
    SELECT department_id
    FROM employees
    WHERE department_name = 'Sales'
);

CREATE TEMPORARY TABLE temp_departments AS
SELECT department_id
FROM employees
WHERE department_name = 'Sales';

UPDATE employees
SET salary = 5000
WHERE department_id IN (SELECT department_id FROM temp_departments);

DROP TEMPORARY TABLE temp_departments;

UPDATE employees e1
JOIN (
    SELECT department_id
    FROM employees
    WHERE department_name = 'Sales'
) e2 ON e1.department_id = e2.department_id
SET e1.salary = 5000;

UPDATE employees
SET salary = 5000
WHERE department_id IN (select a.department_id  from(
    SELECT department_id
    FROM employees
    WHERE department_name = 'Sales'
)a);