Hello, it seems that Oracle (11R2) doesn't add the Start and End timestamp columns and permit statement like
select * from tt union select * from tt AS OF TIMESTAMP (SYSTIMESTAMP - INTERVAL '6' SECOND) minus select * from tt VERSIONS BETWEEN TIMESTAMP (SYSTIMESTAMP - INTERVAL '6' second) and SYSTIMESTAMP; Regards PAscal -- Sent from: https://www.postgresql-archive.org/PostgreSQL-hackers-f1928748.html
