SQL queries help need-urgent

Question

Based on your inputs-I studied and created the below objects.I apologise for asking lengthy questions,but i
need your help very much now to proceed next.
There is a COMPANY WHICH has many divisions/departments in it.
These divisions has employees.
*{color:#0000ff}--Created employee table which employee_id and Salary.*
**employees (*empid,salary){color}*
*{color:#0000ff}***DO i need to put the DEPT_ID and Manager_id in the EMPLOYEES table? {color}*
*{color:#0000ff}--Presently,iCreated a relationship table to have EMPLOYEE"S MANAGER information.a manager is an employee itself.{color}*
*{color:#0000ff}--Created a table for EMPLOyee and department---RELATIONSHIP ---> empl_id and dept_id{color}*
The COMPANY has numerous Products(also we can say projects) and these project work is done by the various depts.
*{color:#0000ff}Projects /Job table*
*--job_id*
*--Project_name*
*--Budget Amount{color}*
*{color:#0000ff}--Created a table for Project and department---RELATIONSHIP ---> proj_id and dept_id*
*--Also,Created a table for Project and Employee---RELATIONSHIP ---> proj_id and employee_id{color}*
Also,here scenario (1)Employees can work or be a part of many or multiple departments and work for multiple projects/products at a time (2)As usual-each Department has a manager.**EVery dept can handle or work only on one project.
*{color:#0000ff}--Created a table for Project and department---RELATIONSHIP ---> proj_id and dept_id*
*--Also,Created a table for Project and Employee---RELATIONSHIP ---> proj_id and employee_id*
*{color}*
_*{color:#000000}***(1)Are the tables and the relationships defined above enough or have i created too much tables?Please advise me.{color}*_
Queries:-Need to write SQLs for below items.Please help me.Could you all have a look
bq. h5. {color:#0000ff} \\ _     (2)SQL for a person see all his manager?***A person can have 2,3 managers._ \\ _     (3)need a person--->manager-->and their manager's MANAGER_ \\ _     (4)How will managers to view all employees reporting to him._ \\ {color} \\ h5. \\ {color:#0000ff}_(5)feasibility (SQL) to support the increase of salaries of employees in a department by percentage or amount wise._ \\ _     (6)SQL to update or change manager of a department/employee._ \\ {color} \\ h5. \\ {color:#0000ff}_(7)If a employee is removed-then all related details should also be removed._ \\ _     (8)to remove person and department,terminate a person from organisation_ \\ _     SHIFTING a person to different department,assign a person to a department_{color} \\ h5. {color:#0000ff}_SQL to collect all info of a person, his managers , departments and project this employee works._ \\ _     find Department which dont have managers._{color} \\ h5. \\ {color:#0000ff}_****find expenditure all projects together in terms of salary_{color}

Answer 1

Sorry for all the confusion with the questions.So let me clear myself,i am doing this not as assignment or homework,but something
which interests me and trying to leran.Earlier as I stated that its a part of my school(** well frnakly speaking, it was my plan if i could
put this as an item of the school as the scope is very huge.
*(1)one employee can be in many departments(1 TO MANY) and and each department has one manager.(1 to 1)*
Created a table for EMPLOyee and department-RELATIONSHIP ---> empl_id and dept_id*
(2)Also,an employee can work in multiple items/projects(1-MANY) at a time. And a project HAS only one department.(1 to 1)
**Projects table created has codes,the Project name ,Planned budget cost/amount, start_date and end_date AND DEPART_ID
Also,Created a table for Project and Employee-RELATIONSHIP ---> proj_id and employee_id*
This is the full scenario has put above.So,i needed help as I am very confused if i have done the correct relationships.
And,these below items are my plans to allow the schema nd tables support it.
(2)how will a person see all his manager?***A person can have 2,3 managers.(EMP->MANAGER relationship TABLE)
(3)SQL to be able to show a person--->manager-->and their manager's MANAGER
(4)How will managers to view all employees reporting to him.
(5)SQL to support the increase of salaries of employees in a department by percentage or amount wise.
(6)SQL to update or change manager of a department/employee.
(7)If a employee is removed-then all related details should also be removed.
(8)to remove person and department,terminate a person from organisation
SHIFTING a person to different department,assign a person to a department
Projects /Job table EMPLOYEES TABLE-> SALARY info
--job_id
--Project_name
--Budget Amount