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Demos are being upgraded to reflect the new Container paradigm as well as EBR (Edition Based Redefinition) and may contain references to CDBs, PDBs, and other objects you may not be familiar with such as CDB_OBJECTS_AE: Welcome to 12c.Have you viewed the Library's main Table of Contents? [The alternative to sequences used in other RDBMS products is autonumbering and keeping the current number in a table.CREATE SEQUENCE gokhan.sample_seq START WITH 1000; SELECT last_number FROM user_sequences WHERE sequence_name = 'SAMPLE_SEQ'; LAST_NUMBER ----------- 1000 ALTER SEQUENCE gokhan.sample_seq INCREMENT BY -500; SELECT gokhan.sample_seq.
The sequence’s last value is stored in memory and a certain definable number of values are pre-fetched and cached in memory (default is CACHE=20). The resulting SQL_ID and statement for this recursive SQL is: In our case it was the #1 top statement in terms of cumulative CPU.
NEXTVAL); / / / SELECT * FROM seq_test; INSERT INTO seq_test VALUES (seq_maxval.
NEXTVAL FROM dual; SELECT sequence_name, last_number FROM user_sequences; SELECT seq_cache.
NEXTVAL); SELECT * FROM seq_test; INSERT INTO seq_test VALUES (seq_maxval.
NEXTVAL); 100; SELECT sequence_name, last_number FROM user_sequences; SELECT seq_cache.