PL/SQL Cursor Exercises: Display the department name, name of the manager, number of employees in each department, and number of employees listed in job_history
PL/SQL Cursor: Exercise-29 with Solution
Write a PL/SQL block to display the department name, name of the manager, number of employees in each department, and number of employees listed in job_history.
Display department name, manager, employees count
Sample Solution:
Table: employees
employee_id integer first_name varchar(25) last_name varchar(25) email archar(25) phone_number varchar(15) hire_date date job_id varchar(25) salary integer commission_pct decimal(5,2) manager_id integer department_id integer
Table: departments
department_id integer department_name varchar(25) manager_id integer location_id integer
PL/SQL Code:
DECLARE
CURSOR dpt_cur IS
SELECT d.department_id id,
department_name name,
Nvl(first_name, ' ') manager
FROM departments d
left outer join employees e
ON ( d.manager_id = e.employee_id );
emp_count NUMBER(3);
job_hist_count NUMBER(3);
BEGIN
FOR dept_all IN dpt_cur LOOP
SELECT Count(*)
INTO emp_count
FROM employees
WHERE department_id = dept_all.id;
SELECT Count(*)
INTO job_hist_count
FROM job_history
WHERE department_id = dept_all.id;
dbms_output.Put_line(Rpad(dept_all.name, 20)
|| Rpad(dept_all.manager, 15)
|| To_char(emp_count, '9999')
|| To_char(job_hist_count, '9999'));
END LOOP;
END;
/
Sample Output:
SQL> / Public Relations Hermann 1 0 Shipping Adam 45 2 Finance Nancy 6 0 Marketing Michael 2 1 Accounting Shelley 2 2 IT Alexander 5 1 Executive Steven 3 2 Human Resources Susan 1 0 Purchasing Den 6 0 Sales John 34 2 Administration Jennifer 1 0 Payroll 0 0 Recruiting 0 0 Retail Sales 0 0 Government Sales 0 0 IT Helpdesk 0 0 NOC 0 0 IT Support 0 0 Operations 0 0 Contracting 0 0 Construction 0 0 Manufacturing 0 0 Benefits 0 0 Shareholder Services 0 0 Control And Credit 0 0 Corporate Tax 0 0 Treasury 0 0 PL/SQL procedure successfully completed.
Flowchart:
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