Mysql-implementation of the following system functions

System users are divided into four roles. After logging on to the four roles, you can see that the functional modules used are different. Role A uses two functions: 1. view the list of tasks to be scheduled; 2. select a task from the task to be scheduled and assign it to role B. role B uses three functions: 1. view the list of tasks assigned by A. 2. select a task and enter the planned completion time. 3. enter the table corresponding to the task (which can be the simplest and can be filled in as a reference ). Role C uses one function: 1. view the task list after role B enters the planned completion time. Role D uses two functions: 1. view the table filled in by role B; 2. enter the review comments on the table. It is best to achieve these basic functions... the system mysqljava websql server

System users are divided into four roles.
After logging on to the four roles, you can see that the functional modules used are different.
Role A uses two functions: 1. view the list of tasks to be scheduled; 2. select A task from the task to be scheduled and assign it to role B;
Role B uses three functions: 1. view the list of tasks assigned by A. 2. select a task and enter the planned completion time. 3. enter the table corresponding to the task (which can be the simplest and can be filled in as a reference ).
Role C uses one function: 1. view the task list after role B enters the planned completion time.
Role D uses two functions: 1. view the table filled in by role B; 2. enter the review comments on the table.
For help, it is best to use engineering documents that can complete these basic functions as a reference.
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