Oracle to MySQL Migration: 2 Easy Methods

on Data Integration • December 23rd, 2021 • Write for Hevo

Oracle to MySQL

Businesses’ data volume has grown exponentially over the past few years. This could be data related to how people interact with their product or service, what people think of their offerings, how well the performance of their marketing efforts, etc.

Oracle and MySQL are two of the most popular Relational Database Management Systems (RDBMS).

A large number of businesses widely use both Oracle and MySQL. These databases share several key similarities as well as differences.

Many users connect Oracle to MySQL for data migration per their use cases.

This article will help you understand two easy methods to help you set up Oracle to MySQL Migration, enabling you to leverage the advantages of both databases.

You will also get a good overview of setting up an ETL Pipeline for Oracle to MySQL data migration

Table of Contents

Prerequisites for Oracle to MySQL Migration

You will require the following to set up Oracle to MySQL Migration properly:

  • Up and running setup of Windows Server 2008 with Oracle 11.2.0 or later.
  • MySQL database up and running.
  • Basic understanding of Databases and SQL Commands for use.

Methods to Set up Oracle to MySQL Migration

You can set up Oracle to MySQL Migration by implementing one of the following methods:

Method 1: Using Hevo Data to Set up Oracle to MySQL Migration

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Hevo helps you directly transfer data from Oracle and various other sources to MySQL or any Business Intelligence tools, Data Warehouses, or a destination of your choice in a completely hassle-free & automated manner.

Hevo is fully managed and completely automates the process of loading data from your desired source and enriching the data and transforming it into an analysis-ready form without having to write a single line of code.

Its fault-tolerant architecture ensures that the data is handled securely and consistently with zero data loss.

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Hevo takes care of all your data preprocessing needs required to set up Oracle to MySQL Migration and lets you focus on key business activities and draw a much more powerful insight on how to generate more leads, retain customers, and take your business to new heights of profitability.

It provides a consistent & reliable solution to manage data in real-time and always have analysis-ready data in your desired destination. 

The following steps can be implemented to set up Oracle to MySQL Migration using Hevo:

  • Configure Source: Connect Hevo Data with Oracle by providing a unique name for your Pipeline and information about your Oracle database, such as its name, IP Address, Port Number, Username, Password, etc.
Oracle Hevo Source - Oracle to MySQL
  • Integrate Data: Complete Oracle to MySQL Migration by providing your MySQL database credentials, such as your authorized Username and Password, along with information about your Host IP Address and Port Number value. You will also need to provide a name for your database and a unique name for this destination.
MySQL Hevo Destination - Oracle to MySQL

All of the capabilities, None of the firefighting

Using manual scripts and custom code to move data into the warehouse is cumbersome. Frequent breakages, pipeline errors, and lack of data flow monitoring make scaling such a system a nightmare. Hevo’s reliable data pipeline platform enables you to set up zero-code and zero-maintenance data pipelines that just work.

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Method 2: Manual Oracle to MySQL Migration 

  • Login to MySQL with your credentials.
  • Launch the option for the ODBC Connector data source.
  • Setup the Oracle ODBC data source to your MySQL database.
ODBC - Oracle to MySQL
Image source – https://hs2n.files.wordpress.com/2012/04/mysql.png
  • Fill in the required details to connect the Oracle Server name, user, password, and database. Provide a suitable ODBC connection name. Click on the Test button to test the connection. 
  • Configure listener.ora file from Oracle. Navigate to the Oracle installation directory, and you’ll find the listener.ora file under $ORACLE_HOME/NETWORK/ADMIN directory and add the following to it:
SID_LIST_LISTENER =
<Space>(SID_LIST=
<Space>(SID_DESC=
<Space>(SID_NAME=test)
<Space>(ORACLE_HOME=C:oracleproduct11.2.0dbhome_1)
<Space>(PROGRAM=dg4odbc)
)
)
  • Update the location of ORACLE_HOME if the path mentioned is not your installation path.
  • The above configuration tells Oracle to use the dg4odbc program.
  • If you face any issue, type dg4odbc in the command line to check if that program exists or not. If you get an error as “Program not recognized”, add $ORACLE_HOME/bin to your path variable and relaunch the command line to check. 
  • Configure inittest.ora. The file will be created when you create a new SID in the listener.ora file. The naming convention of the file is init + SID name. Configure data source / SID for dg4odbc. Add the following to your inittest.ora file:
HS_FDS_CONNECT_INFO = test
  • The above line specifies which ODBC connection to use. In this case, in step 1, you have created an ODBC connection to form the connection. 
  • Configure tnsnames.ora file. The file location is $ORACLE_HOME/NETWORK/ADMIN/TNSNAMES.ora. Add the following lines to the file:
TSLINK = 
(DESCRIPTION=
(ADDRESS=
(PROTOCOL=TCP)
(HOST=localhost)
(PORT=1521)
)
(CONNECT_DATA=
(SID=test)
)
(HS=OK)
)
  • In the above configuration, the HS=OK entry is very important, and you must ensure that you have used the same SID created on the listener.ora file.
  • Restart the Oracle Service and the TNS Listener Service.
  • Once Oracle is up and running, create a database Link in Oracle. Log in to the Oracle database with DBA rights (e.g. as SYS) and create the database link using the following syntax:
create public database link link2mysqltest connect to "oracle" identified by "oracle" using 'TSTLINK';
  • Test database link and click on Finish.
  • Login to MySQL and run the below query which uses the test link created in the above steps.
select * from "test_table"@link2mysqltest
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Download the Ultimate Guide on Database Replication
Download the Ultimate Guide on Database Replication
Learn the 3 ways to replicate databases & which one you should prefer.

Limitations of Manual Oracle to MySQL Migration

The limitations of manually setting up Oracle to MySQL Migration are as follows:

  • Even though the user only has to make a few configuration changes to set up Oracle to MySQL Migration, it is difficult to get this migration right without deep Oracle administration knowledge. This might lead to Oracle throwing errors because of multiple configuration parameters that vary across different versions.
  • Even after getting the Oracle to MySQL Migration right, the connection, in reality, has many constraints and rough edges concerning the SQL queries that can be executed. You will encounter problems with functions and data types that are not supported at source and target databases.

Conclusion

This article provided a step-by-step guide on how to set up Oracle to MySQL Migration manually or using Hevo.

However, there are certain limitations associated with the manual method. If those limitations are not a concern to your operations, then using it is an option, but if it is then you should consider using the automated Data Pipeline platform, Hevo.

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The transparent pricing and 24×7 support make Hevo the highest-rated data pipeline software on many review sites.

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What are your thoughts on moving data from Oracle to MySQL? Let us know in the comments.

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