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Appreciate your comments on Database migration from Oracle to SQL Server ...

Posted By:      Posted Date: October 15, 2010    Points: 0   Category :Sql Server

Appreciate your comments on Database migration from Oracle to SQL Server ...

From my perspective, there are two major known issues that would cause major

resource consumption for porting My-App from Oracle to Microsoft SQL Server. First,

the Perl code within My-App reads the Oracle object meta-data for defining it's

internal objects and data types. SD would be the best group to identify the effort

to replace this dynamic functionality. The second issue is the coding required

to replace Oracle's built-in functionality to work with data hierarchies / tree

structures / parent-child relationships.

The My-App Data Model is heavily based on parent-child relationships through out

numerous tables; every item has a parent, every person has a manager, every team

may or may not be nested, etc. Oracle has native SQL clause, connect_by, to query

these structures. Oracle also provides pseudo columns for the connect_by meta data,

such as levels, path, isleaf, cycle options, etc. The connect_by functionality with

Microsoft SQL Server (see Reference below) is done natively with a "with" clause or

via custom procedures. SQL Server does not provide any pseudo columns functionality.

Also, SQL Server does not support any analytic and aggregate func

View Complete Post

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