Joining Queries from Oracle and SQL Server Databases

I need a query that retrieves info from an Oracle table and a query that retrieves info from a SQL Server table. The info has to be joined together according to Record ID numbers. I have very limited access to the Oracle database but full control of the SQL Server database.

How do I join two different queries from two different databases?

To query to different data sources, you can make the Oracle server a linked server to the SQL Server server. A linked server can be any OLE DB data source and SQL Server currently supports the OLE DB data provider for Oracle. You can add a linked server by calling sp_AddLinkedServer and query information about linked servers with sp_LinkedServers.

An easier way to add a linked server is to use Enterprise Manager. Add the server through the Linked Servers icon in the Security node. Once a server is linked, you can query it using a distributed query (you have to specify the full name).

Here’s an example of a distributed query (from the SQL Server Books Online) that queries the Employees table in SQL Server and the Orders table from Oracle:

SELECT emp.EmloyeeID, ord.OrderID, ord.DiscountFROM SQLServer1.Northwind.dbo.Employees AS emp,OracleSvr.Catalog1.SchemaX.Orders AS ordWHERE ord.EmployeeID = emp.EmployeeIDAND ord.Discount > 0

Share the Post:
Share on facebook
Share on twitter
Share on linkedin


The Latest

Top 5 B2B SaaS Marketing Agencies for 2023

In recent years, the software-as-a-service (SaaS) sector has experienced exponential growth as more and more companies choose cloud-based solutions. Any SaaS company hoping to stay ahead of the curve in this quickly changing industry needs to invest in effective marketing. So selecting the best marketing agency can mean the difference

technology leadership

Why the World Needs More Technology Leadership

As a fact, technology has touched every single aspect of our lives. And there are some technology giants in today’s world which have been frequently opined to have a strong influence on recent overall technological influence. Moreover, those tech giants have popular technology leaders leading the companies toward achieving greatness.

iOS app development

The Future of iOS App Development: Trends to Watch

When it launched in 2008, the Apple App Store only had 500 apps available. By the first quarter of 2022, the store had about 2.18 million iOS-exclusive apps. Average monthly app releases for the platform reached 34,000 in the first half of 2022, indicating rapid growth in iOS app development.