How to create custom sequence in Oracle SQL?
My trigger for Parent Item generates Sequence as “P2505” and I want my sub-Items Sequence should be “P2505-1”, for 2nd Sub-Item it should be “P2505-2” and so on. If the next parent Item has Sequence “P2506” then sub Item Sequence should be “P2506-1” and so on.
How to assign a custom ID using a trigger?
SQL> insert into Atendant (NAME) values (‘phil’); 1 row created. SQL> select * from Atendant; ID NAME —— ———- ATN1 phil SQL> So all you were really missing was the data type and doing the concatenation correctly. Thanks for contributing an answer to Database Administrators Stack Exchange! Please be sure to answer the question.
How to serialize a child number sequence in Oracle?
I’ll call this column CHILD_NUMBER_SEQUENCE. Now, to serialize the “number generator” for CHILD_SEQUENCE, you must obtain a lock based on PARENT_ITEM_ID. For Oracle, the easiest way is to lock the parent row.
How to add a sequence trigger to a database table?
Listed below is an example of the SQL generated by the Oracle Add Sequence Trigger function: CREATE OR REPLACE TRIGGER TEST_SEQ_TRIGGER BEFORE INSERT ON TESTUSER.EMPLOYEE FOR EACH ROW BEGIN IF :new.SSN IS NULL THEN SELECT TEST_SEQUENCE.nextval INTO :new.SSN FROM DUAL; END IF; END; Below is a screen shot of the add sequence trigger function…
Can a sequence be generated in Oracle 12c?
This might not help if you are running inserts from JDBC or other external applications using a sequence. Oracle 12c introduced the IDENTITY columns, using which you could create a table with an identity column, which is generated by default. Thanks for contributing an answer to Stack Overflow!
How to find triggers associated with Oracle tables?
If you’re actually looking at a different schema then you’ll need to use all_tables etc. and filter and join on the owner column for the user you’re looking for. And if you want to include tables which don’t have triggers, or triggers which don’t refer to sequences, you can use outer joins.