Oracle 18c New feature Private Temporary Table

Hello, 18c introduced a new object called Private Temporary Table (I will call it PTT in this post). PTT is just another version of Global Temporary Table(GTT). The data is temporary and will be stored for a time. Data in temporary tables (both PTT and GTT) can be queried by the session which inserts the

Sequential ID column without gap!

Hello, A customer is asking to you generate order numbers one by one and without gap! What an unpleasant request isn’t it? if you are not familiar to databases then you might think that this request is logical but it is not. So your customer asked for this and you decided to develop your code