Get disk space

I just read today on that checking disk space in java will be platform independent in the class before 2007, add a few years until it is integrated in Oracle. But I cannot wait that long, so I decided to write my own code with “df” on my AIX box. Ok, let’s do… Continue reading Get disk space

One example about hierarchies

Today morning I just received a question from a friend where I used hierarchies : > Let’s assume a couple of persons have bought some cakes togeher and they want to eat it: > > Create table cake_owners > (owner# number, > cake# number, > constraint cake_pk primary key (owner#,cake#) > using index); > >… Continue reading One example about hierarchies

Hierarchical queries

The typical hierarchical query is you want to select your boss, and the boss of your boss, etc. It could look like select prior ename ename, ename mgr from emp connect by prior mgr=empno start with ename=’SCOTT’; SCOTT SCOTT JONES JONES KING I start with Scott and the hierarchy is built. I can use the… Continue reading Hierarchical queries