In Oracle, how does one implement the function of auto-adding IDs? _ PHP Tutorial

In Oracle, how does one implement a function similar to automatically adding an ID ?. We often use an ID automatically assigned by the system as our primary key when designing a database, but this feature is not available in ORACLE, we can use the following features to implement that we often use an ID automatically assigned by the system as our primary key when designing a database. However, this feature is not available in ORACLE.
You can use the following functions to automatically add ids.
1. first create sequence
Create sequence seqmax increment by 1
2. usage
Select seqmax. nextval ID from dual
You get an ID.
If you put this statement in the trigger, you can achieve and the MS SQL automatically add the same ID function!

Pipeline does not have such a function. we can implement it by taking the following functions...