How to create a new self-column in Oracle, in general, you need to build a sequence and pay the sequence to a column to rebuild the trigger.
First, open PD15, create a new PDM document, and create a new one, as shown in the figure:
The second step is to create a sequence. Create a new sequence by opening the list window of the series in "Model"-"Sequence". Then open the sequence of the property settings item "Physical Options", do the following settings, click OK, the sequence is established.
In the third step, you apply the sequence you just created to the table's primary key column, as shown in the figure: Click OK, it's not over yet, the key step is to rebuild the trigger.
Fourth step: Rebuild the trigger, under "Tools" as shown, click
Click OK, so that a trigger is automatically created to add the value of the sequence to the primary key.