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.NET application to support Oracle & SQL Server

Hello Folks,

I need to build a .NET Application. Initially, it will support to Oracle and later with SQL Server.
So, once migrate with Oracle to SQL Server for data and db schema. It will be done by migration tool.

But, how about CRUD operation, which should common for Oracle and SQL Server?
Should I use plain sql and run time judge with SQL Server & Oracle client OR maintain two entity model?
Do you have any thoughts & suggestions?

Best Regards,
Mohit Sharma

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Vitor Montalvão

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Éric Moreau

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Pawan Kumar

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Vitor Montalvão

Oracle and SQL Server(t-sql) syntaxes are very different specially the update statement.

Really? Do you have examples that states your affirmation? I can't see any difference besides the in-built functions that are specific for each SQL language.

Pawan Kumar

Example-

This will not work in Oracle but works really well in SQL Server.

Update x
SET x.c1 = y.c1
FROM table1 x
INNER JOIN table2 y ON x.a = y.a

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Vitor Montalvão

Well, that's not ANSI-SQL. In my comment I told that if the author uses ANSI-SQL it won't have issues.
For your example the following will work on both Oracle and SQL Server:

UPDATE table1
SET c1 = (SELECT y.c1
          FROM table2 y
          WHERE table1.a = y.a);

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EDIT: Code updated

Pawan Kumar

Yes thats what. The one one is so used to SQL Server syntax will face issues like me :)

MohitPandit

ASKER

Thanks for your comments & suggestions. I'll get back.

MohitPandit

ASKER

Thanks

.NET application to support Oracle &amp; SQL Server

.NET application to support Oracle & SQL Server