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We don’t need all of the gateways, so only the one for SQL Server is selected. I’ll use my existing Oracle home, going from this: #Mysql database server express stackoverflow install#The caveat on this is that if your Oracle installation is patched, then you will have to re-patch the installation as the DG4ODBC install may overwrite patched files. The documentation states that you don’t need to edit the Oracle home value or path, but which Oracle home were the writers referring to? Installation of this add-on is where having a CSI for Oracle support comes in handy: the tech notes tell you that installing in an existing Oracle home is okay. ![]() You’ll see the typical welcome screen for 11 g. Given that Oracle 11 g is already installed, it is highly likely the Oracle Universal Installer for Gateways will start up with no problem. #Mysql database server express stackoverflow software#SQL Server database name – either of the AdentureWorks or AdventureWorksDW databases are suitable.ĭownload and unzip (not in your Oracle software installation) the gateway file, and run setup.exe. Also, the installer never starts the Net Configuration Assistant (as shown in the documentation). Select When you get to the actual installation of Gateways, the OUI never asks for the port number (despite what the guide shows), so what you do need is the server name, instance name, and a database name. To find the port, run the following: DECLARE nvarchar(5) ![]() SQL Server database server port number – just as Oracle uses 1521 as a standard port, MSSQL uses 1433 as its typical port. SQL Server database server host name – if running Oracle and MSSQL on the same server, this is simply your computer’s name. You’ll need to collect the following information (for the OUI) regarding the target database system: So, one thing you’ll want to know ahead of time is a valid table in the SQL Server database you’re trying to connect to. Both of them use a sample select statement against “systables” when the actual table is sys.tables. One document shows use of a colon when specifying a port number, the other uses a comma. #Mysql database server express stackoverflow how to#The differences include how to specify the HS_FDS_CONNECT_INFO parameter in the initdg4msql.ora file, which is probably the single most important parameter in the entire file. “How to Setup DG4MSQL (Database Gateway for MS SQL Server) on Windows 32bit (Doc ID 466267.1)” How to Setup DG4ODBC (Oracle Database Gateway for ODBC) on Windows 32bit (Doc ID 466225.1) #Mysql database server express stackoverflow plus#The sources include the instructions in the guide, plus two documents on My Oracle Support: There are three sources of information on how to configure Oracle to access SQL Server, and you can pick and choose among them to get the final answer. Once the database systems are in place (Oracle 11 gR2 and SQL Server 2008 for this example), it becomes a fairly simple matter (well, almost) of following instructions regarding the DG4ODBC installation and configuration. In addition to the SQL Server installation, you’ll also need some SQL Server databases. Or, as covered before, spring for a copy of the developer edition and get an Enterprise Edition installation for a fraction of the commercial retail price. #Mysql database server express stackoverflow download#How do you get SQL Server? Download it from MSDN and sign up for a 180-day trial. What do you need for a test environment? Obviously Oracle database, and although several ODBC data sources are covered in the guide (Sybase et al), the external RDBMS here is SQL Server. Of interest for us in this article is the Database Gateway Installation and Configuration Guide for Microsoft Windows guide, given that most users are using Windows to learn Oracle. The documentation for database gateways includes seven guides, covering various flavors of UNIX, plus Windows. The product title for Oracle 11 gR2 on Windows (32-bit), as an example, is “ Oracle Database Gateways 11 g Release 2 (11.2.0.1.0) for Microsoft Windows (32-bit)” and is found under the download section for Databases at OTN. The key part of this connection architecture is based on ODBC.Ī new (since Oracle 11 gR1) piece of this setup involves downloading and installing DG4ODBC resources into an existing Oracle RDBMS installation. The new and improved method is named Database Gateways, and the name reference is commonly seen as DG4ODBC (or dg4odbc). Connecting Oracle Database to external data sources was formerly handled using OHS, or Oracle Heterogeneous Services. Setting up a connection to Oracle Database from SQL Server is fairly easy, but the opposite is not so true. Steve Callan walks you through a complete example of how to access SQL Server from Oracle Database using, named Database Gateways (Oracle’s new and improved method). ![]()
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