INSERT into statement not working in oracle when using INSERT INTO .. SELECT * FROM

I have vh_emp table whose table structure is(This is empty table):

I am taking data from employee table as source table where I wrote some query to match with vh_emp table:

SELECT e.emp_id       EMP_ID, 
       e.emp_name     EMP_NAME, 
       e.dob          DOB, 
       e.join_date    JOIN_DATE, 
       CASE 
         WHEN e.leave_date IS NULL THEN Trunc(sysdate) 
         ELSE e.leave_date 
       END            AS LEAVE_DATE, 
       e.salary / 100 SALARY, 
       d.dept_name    DEPT_NAME, 
       one.addr_name  ADDRESS_ONE, 
       two.addr_name  ADDRESS_TWO, 
       b.emp_name     AS MANAGER_NAME 
FROM   offc.employee e 
       LEFT JOIN offc.department d 
              ON e.dept_id = d.dept_id 
       LEFT JOIN offc.add_line_one one 
              ON e.line1 = one.addr_id_one 
       LEFT JOIN offc.add_line_two two 
              ON e.line2 = two.addr_id_two 
       LEFT OUTER JOIN (SELECT * 
                        FROM   offc.employee) b 
                    ON e.manager_id = b.emp_id; 

The query is running fine and the output is coming fine from this query:

So,I wanted to insert these data in vh_emp tables using :

INSERT INTO offc.vh_emp 
            (emp_id, 
             emp_name, 
             dob, 
             join_date, 
             leave_date, 
             address_one, 
             address_two, 
             salary, 
             manager_name, 
             dept_name) 
SELECT e.emp_id       EMP_ID, 
       e.emp_name     EMP_NAME, 
       e.dob          DOB, 
       e.join_date    JOIN_DATE, 
       CASE 
         WHEN e.leave_date IS NULL THEN Trunc(sysdate) 
         ELSE e.leave_date 
       END            AS LEAVE_DATE, 
       e.salary / 100 SALARY, 
       d.dept_name    DEPT_NAME, 
       one.addr_name  ADDRESS_ONE, 
       two.addr_name  ADDRESS_TWO, 
       b.emp_name     AS MANAGER_NAME 
FROM   offc.employee e 
       LEFT JOIN offc.department d 
              ON e.dept_id = d.dept_id 
       LEFT JOIN offc.add_line_one one 
              ON e.line1 = one.addr_id_one 
       LEFT JOIN offc.add_line_two two 
              ON e.line2 = two.addr_id_two 
       LEFT OUTER JOIN (SELECT * 
                        FROM   offc.employee) b 
                    ON e.manager_id = b.emp_id; 

But,I executed this query I got error as:

ORA-01722: invalid number

The structure of table employee is:

why is this error coming? I reviewed and saw that datatype is same for the column and value of select statement.This error should not appear as column datatype is matching.

Answer

Order of your insert clause column name and select clause column name should match.

Please match the positions of them as following:

INSERT INTO offc.vh_emp 
            (emp_id, 
             emp_name, 
             dob, 
             join_date, 
             leave_date, 
             Salary,  -- this
             dept_name, -- this
             address_one, 
             address_two,
             manager_name 
             ) 
SELECT e.emp_id       EMP_ID, 
       e.emp_name     EMP_NAME, 
       e.dob          DOB, 
       e.join_date    JOIN_DATE, 
       CASE 
         WHEN e.leave_date IS NULL THEN Trunc(sysdate) 
         ELSE e.leave_date 
       END            AS LEAVE_DATE, 
       e.salary / 100 SALARY, 
       d.dept_name    DEPT_NAME, 
       one.addr_name  ADDRESS_ONE, 
       two.addr_name  ADDRESS_TWO, 
       b.emp_name     AS MANAGER_NAME 
FROM   offc.employee e 
       LEFT JOIN offc.department d 
              ON e.dept_id = d.dept_id 
       LEFT JOIN offc.add_line_one one 
              ON e.line1 = one.addr_id_one 
       LEFT JOIN offc.add_line_two two 
              ON e.line2 = two.addr_id_two 
       LEFT OUTER JOIN (SELECT * 
                        FROM   offc.employee) b 
                    ON e.manager_id = b.emp_id; 

Cheers!!