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--- kurs:sets_gruppenoperatoren [2010/10/30 15:00]
mh
+++ kurs:sets_gruppenoperatoren [2014/09/10 21:22] (current)
@@ Line 1: / Line 1: @@
+<code>
+select employee_id,
+       first_name,
+       last_name,
+       department_id,
+       job_id,
+       hire_date,
+       start_date,
+       end_date,
+       status
+       from (
+select employee_id,
+       first_name,
+       last_name,
+       department_id,
+       job_id,
+       hire_date,
+       (select max(end_date)+1 from job_history
+           where employee_id = employees.employee_id)
+       start_date,
+       null end_date,
+       'aktuell' status,
+zeit
+  from employees
+union
+select h.employee_id,
+       first_name,
+       last_name,
+       h.department_id,
+       h.job_id,
+       hire_date,
+       start_date,
+       end_date,
+       'historisch',
+zeit
+from job_history h join employees e
+  on h.employee_id = e.employee_id
+) o
+where employee_id = 176
+order by employee_id,
+         zeit,
+         start_date
+</code>
+<code>
+select status,
+       job_id,
+       first_name,
+       last_name,
+       coalesce(start_date,
+          (select max(end_date)+1
+            from job_history where employee_id = fe.employee_id),
+            hire_date) start_date,
+       end_date
+       from (
+SELECT 'H' status,
+       employees.employee_id,
+       JOB_HISTORY.job_id,
+       EMPLOYEES.FIRST_NAME,
+       EMPLOYEES.LAST_NAME,
+       hire_date,
+       start_date,
+       end_date
+FROM EMPLOYEES , JOB_HISTORY
+WHERE ( (EMPLOYEES.EMPLOYEE_ID = JOB_HISTORY.EMPLOYEE_ID) )
+union
+select 'A',
+       employees.employee_id,
+       job_id,
+       first_name,
+       last_name,
+       hire_date,
+       null,
+       null
+from employees
+) fe
+--where last_name = 'Kochhar'
+order by last_name, first_name, start_date
+</code>
 <code>
  select * from
@@ Line 76: / Line 157: @@
 where history.employee_id = employees.employee_id
 </code>
+<code>
+with history_union_employees as
+(
+SELECT 1 h, EMPLOYEES.FIRST_NAME,
+       EMPLOYEES.LAST_NAME,
+       JOB_HISTORY.START_DATE,
+       JOB_HISTORY.END_DATE,
+       JOB_HISTORY.JOB_ID
+FROM JOB_HISTORY , EMPLOYEES
+WHERE ( (EMPLOYEES.EMPLOYEE_ID = JOB_HISTORY.EMPLOYEE_ID) )
+union
+select 2 h, EMPLOYEES.FIRST_NAME,
+       EMPLOYEES.LAST_NAME,
+       null,
+       null,
+       job_id
+from employees where employee_id in (select employee_id from job_history)
+)
+select first_name, last_name, start_date, end_date, job_title from
+ history_union_employees h join
+ jobs j on h.job_id = j.job_id
+order by last_name, nvl(end_date,sysdate)
+</code>
+<code>
+select status,
+       job_id,
+       first_name,
+       last_name,
+       coalesce(start_date,
+          (select max(end_date)+1
+            from job_history where employee_id = fe.employee_id),
+            hire_date) start_date,
+       end_date
+       from (
+SELECT 'H' status,
+       employees.employee_id,
+       JOB_HISTORY.job_id,
+       EMPLOYEES.FIRST_NAME,
+       EMPLOYEES.LAST_NAME,
+       hire_date,
+       start_date,
+       end_date
+FROM EMPLOYEES , JOB_HISTORY
+WHERE ( (EMPLOYEES.EMPLOYEE_ID = JOB_HISTORY.EMPLOYEE_ID) )
+union
+select 'A',
+       employees.employee_id,
+       job_id,
+       first_name,
+       last_name,
+       hire_date,
+       null,
+       null
+from employees
+) fe
+--where last_name = 'Kochhar'
+order by last_name, first_name, end_date
+</code>

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