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我有三个表，Roles、Permissions 和 Role_Permissions

Table Roles has the following: id, role_name
Data:   id, role_name
         1, Accounting
         2, Order_Entry
         3, Shipping

Table Permission has: id, permission _name
Data:   id, permission _name
         1, Admin
         2, Super_User
         3, Read_Write
         4, Read_Only

Table Role_ Permissions has: 
     role_id (FK from Roles), 
     permission_id (FK from Permissions)

我需要创建一个如下所示的矩阵：

Heading:       Roles        Admin Super_User Read_Write Read_Only
Columns/Rows:  Accounting     X        X
               Order_Entry    X                  X          
               Shipping       X                             X

“X”表示该角色有权限。当然，空白意味着该角色没有权限可以在SQL中完成吗

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