Mysql up.user\u id、u.first\u name、u.last\u name”，那么您不需要使用maxThis@Patrick运行得很好。如果我不想通过将末尾的have comparison更改为“having count（up.permission

---

up.user\u id、u.first\u name、u.last\u name”，那么您不需要使用maxThis@Patrick运行得很好。如果我不想通过将末尾的have comparison更改为“having count（up.permission\u id）！=计数（perm.permission\u id）”。但是，当我执行相反的检查时，它将忽略在users\u permissions表中没有任何权限的用户。尝试将第一个加入保留为保留所有用户，但没有帮助。对此情况有何建议？

users
    id
    first_name
    last_name
    department_id

permissions
    id
    name

departments (relation to groups and categories based on department)
    id 
    name
    category_id
    group_id

categories
    id
    name

groups
    id
    name

departments_permissions (permission requirement)
    department_id
    permission_id

categories_permissions (permission requirement)
    category_id
    permission_id

groups_permissions (permission requirement)
    group_id
    permission_id

users_permissions (users have permissions here)
    user_id
    permission_id

SELECT 
    `users`.id, 
    `users`.first_name, 
    `users`.last_name,
    `users`.department_id
FROM 
    `users`
INNER JOIN 
    `departments` ON `users`.department_id = `departments`.id 
INNER JOIN 
    `users_permissions` ON `users`.id = `users_permissions`.user_id 
INNER JOIN 
    (
        SELECT permission_id FROM departments_permissions WHERE department_id = departments.id
        UNION DISTINCT
        SELECT permission_id FROM categories_permissions WHERE category_id = departments.group_id
        UNION DISTINCT
        SELECT permission_id FROM groups_permissions WHERE group_id = departments.group_id
    ) AS tblPermissionsRequired ON `users_permissions`.permission_id = `tblPermissionsRequired`.permission_id
GROUP BY 
    `users_permissions`.user_id;

SELECT u.first_name,u.last_name,p.name
FROM users u, user_permissions up, permissions p
WHERE u.id=up.user_id AND
up.permission_id=p.id
UNION
SELECT u.first_name,u.last_name,p.name
FROM users u, departments d, departments_permission dp, permissions p
WHERE u.department_id=d.id
AND d.id=dp.department_id
AND dp.permission_id=p.id
UNION
SELECT u.first_name,u.last_name,p.name
FROM users u, departments d, categories_permission cp, permissions p
WHERE u.department_id=d.id
AND d.category_id=cp.category_id
AND cp.permission_id=p.id
UNION
SELECT u.first_name,u.last_name,p.name
FROM users u, departments d, groups_permission gp, permissions p
WHERE u.department_id=d.id
AND d.group_id=gp.group_id
AND gp.permission_id=p.id

SELECT A.id,A.first_name,A.last_name,A.department_id 
FROM
(
    SELECT U.*,
    A.Dept_id AS Dept_ID,
    A.permission_id AS [Dept_Wise_Permissiion_List],
    UP.permission_id
    FROM users U
    INNER JOIN (
            SELECT D.id Dept_id,CP.permission_id  
            FROM departments D INNER JOIN categories_permissions CP ON D.category_id = CP.category_id 

            UNION ALL

            SELECT D.id Dept_id,GP.permission_id  
            FROM departments D INNER JOIN groups_permissions GP ON D.group_id = GP.group_id

            UNION ALL

            SELECT D.id Dept_id, DP.permission_id
            FROM departments D INNER JOIN departments_permissions DP ON D.id = DP.department_id

    ) A ON U.department_id =A. Dept_id
    LEFT JOIN users_permissions UP 
        ON U.id = UP.user_id AND A.permission_id = UP.permission_id
)A
GROUP BY A.id,A.first_name,A.last_name,A.department_id 
HAVING COUNT(ISNULL(A.permission_id,1)) = COUNT(A.permission_id)