Please upvote the Kata if you liked it. I've done a lot of Katas, not only solved but translated, created, enhaced and discussed, but to do thing right first studied the puntuation system and it favors community presence over programming skills. Once you reach some rank you can see how points earned change. You can be 2 kyu by solving only about 10 problems, but to be on top 100 you should absulutely be insatiable, participate as much as you can and master as many languages as you can. Currently I've used all codewars languages but F#.

If you are trying to solve with Oracle DB you should use dual as the name of the table, otherwise you don't need to specify a data table name since you are not retriving information.