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--- kurs:connect_by_prior [2012/09/25 17:22]
127.0.0.1 external edit
+++ kurs:connect_by_prior [2014/09/10 21:22]
127.0.0.1 external edit
@@ Line 44: / Line 44: @@
 group by jahr
 order by jahr
+</code>
+<code>
+select prior salary - salary, salary, last_name from (
+  select rownum rn, last_name, salary from (
+    select last_name, salary from employees order by salary desc
+  )
+) connect by prior rn = rn-1
+start with rn = 1
+</code>
+=== Ähnliches Resultat, plain SQL ===
+<code>
+select a.first_name,
+        a.last_name, a.salary,
+        max(b.salary), (max(b.salary)-a.salary)
+from employees a join employees b
+on a.salary > b.salary
+and  a.employee_id <> b.employee_id
+group by a.first_name, a.last_name, a.salary
+order by a.salary desc;
 </code>

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