Order of Data Retrieval Differs After Upgrading From 9i to a Higher Version
Last updated on SEPTEMBER 15, 2016
Applies to:Oracle Database - Enterprise Edition - Version 10.1.0.2 and later
Information in this document applies to any platform.
SCOPE & APPLICATION
SQL output and the order of data
It is not uncommon for SQL in 10g or later, using the same execution plan as previously in 9i, to return the data in a different order for columns outside of the ORDER BY clause.
For example, the following output is from SQL with an ORDER BY NAME clause:
It may well change its order to
After an upgrade, this can cause issues with customers and applications which were reliant on the fixed order of SURNAME although it was not explicitly ordered.
Upgrade from 9.x to a higher version
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