oracle autoincrement with sequence and trigger is not working correctly

Question

here is my problemI have this code to make an autoincrement variable in oracle database:

CREATE TABLE Korisnici
    (
        id_korisnika number PRIMARY KEY         


        

Answer 1

Specifying the SEQUENCE with NOCACHE will stop a session caching 20 numbers at a time and help.

create sequence test_seq
start with 1 
increment by 1
NOCACHE;

However, if you're hoping for a completely contiguous sequence this is very difficult to achieve - numbers taken from the sequence are "lost" if (for example) an insert is rolled back.

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Based on your comment, I wonder if you're forgetting to COMMIT?