Difference between Oracle 7 and later releases

Hi All,
What are the major differences in oracle 7 and lets say oracle 9i?
I have heard that version 7 did not have all the constraints. Is that true?
Naveen

You would have to look at the New Features section of the documentation to get a full list, but among the highlights of what is now available that was not in version 7:
All the object stuff
Analytic Functions
Materialized Views (AKA Snapshots)
Time Zone support
Cost Based Optimizer is hugely improved (In fact the whole SQL Engine seems faster).
Some of these came out in various version 8 releases, but to get the full list you need 9i. There is, or course much more.
In my opinion, the best reason to move off 7.x is support. Version 7 is no longer supported by Oracle. Version 8.1.7 is currently supported, but probably not for too much longer (1 -2 years?). Version 9 should be supported for some time.
If you are going to migrate anyway, you might as well go to the current release.
HTH
John

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<snip>>
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