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--- kurs:sets_gruppenoperatoren [2009/09/23 10:51]
mh
+++ kurs:sets_gruppenoperatoren [2012/10/04 15:43]
mh
@@ Line 1: / Line 1: @@
+<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
+(
+  select employee_id, FIRST_NAME, EMPLOYEES.LAST_NAME  from employees
+    minus
+  SELECT  JOB_HISTORY.EMPLOYEE_ID id, EMPLOYEES.FIRST_NAME fn, EMPLOYEES.LAST_NAME ln
+  FROM JOB_HISTORY , EMPLOYEES
+  WHERE ( (EMPLOYEES.EMPLOYEE_ID = JOB_HISTORY.EMPLOYEE_ID) )
+)
+--where id = 101
+----
+select * from (
+SELECT 0 sb, 'history', start_date, end_date, JOB_HISTORY.EMPLOYEE_ID id, EMPLOYEES.FIRST_NAME fn, EMPLOYEES.LAST_NAME ln, JOB_HISTORY.JOB_ID jid
+FROM JOB_HISTORY , EMPLOYEES
+WHERE  (EMPLOYEES.EMPLOYEE_ID = JOB_HISTORY.EMPLOYEE_ID)
+and JOB_HISTORY.EMPLOYEE_ID = :b_eid
+union
+select 1 sb, 'jetzt', null, sysdate, employee_id, FIRST_NAME, EMPLOYEES.LAST_NAME, JOB_ID  from employees
+where employee_id = :b_eid
+) order by sb, end_date
+select sb, h, start_date, end_date, id, fn, ln, jid, prior jid from (
+SELECT 0 sb, 'history' h, start_date, end_date, JOB_HISTORY.EMPLOYEE_ID id, EMPLOYEES.FIRST_NAME fn, EMPLOYEES.LAST_NAME ln, JOB_HISTORY.JOB_ID jid
+FROM JOB_HISTORY , EMPLOYEES
+WHERE  (EMPLOYEES.EMPLOYEE_ID = JOB_HISTORY.EMPLOYEE_ID)
+and JOB_HISTORY.EMPLOYEE_ID = 101
+union
+select 1 sb, 'jetzt', null, sysdate, employee_id, FIRST_NAME, EMPLOYEES.LAST_NAME, JOB_ID  from employees
+where employee_id = 101
+) connect by PRIOR employee_id
+ by sb, end_date
+</code>
+<code>
+select employee_id as id, job_id, last_name, to_date(sysdate) from employees
+union
+select employee_id, job_id, to_char(null), to_date(end_date) from job_history
+order by 1,3,4 desc
+</code>
+<code>
+select first_name, last_name from employees where employee_id in
+(
+  select employee_id
+  from employees
+  where job_id = 'IT_PROG'
+ union
+  select employee_id
+  from job_history
+  where job_id = 'IT_PROG'
+)
+------
+select first_name, last_name, stand, datum from employees,
+(
+  select employee_id,
+         job_id,
+         'jetzt' stand,
+         sysdate datum
+  from employees
+  where job_id = 'IT_PROG'
+ union
+  select employee_id,
+         job_id,
+         'früher' stand,
+         end_date datum
+  from job_history
+  where job_id = 'IT_PROG'
+) history
+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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