Let's talk about the conversion between Oracle and MySQL

With the widespread popularity of database applications, choosing a database management system (DBMS) suitable for your business has become an essential skill. Oracle and MySQL are two very popular DBMSs. They each have advantages and disadvantages, and there may be differences in applicability in different business scenarios. Therefore, in actual applications, companies or individuals may need to convert between Oracle and MySQL.

This article will introduce the conversion between Oracle and MySQL from the following aspects:

1. The difference between Oracle and MySQL

2. The conversion process between Oracle and MySQL

3. Common Oracle to MySQL conversion tools

4. Common MySQL to Oracle conversion tools

5. Issues that need attention during the conversion process

1. The difference between Oracle and MySQL

Oracle is a large-scale commercial-grade relational database management system, originally developed by the Oracle Corporation in the United States. Oracle has very powerful transaction processing capabilities and high reliability, and can support large-scale enterprise-level application scenarios. It also provides many advanced functions, such as data warehouse, distributed data processing, security management, etc.

MySQL is an open source relational database management system, originally developed by the Swedish MySQL AB company and now maintained by Oracle Corporation. MySQL has the advantages of being lightweight and easy to use. It can provide efficient data management solutions for small teams or enterprises, especially businesses with small site visits.

2. Oracle to MySQL conversion process

Generally speaking, the conversion between Oracle and MySQL can be divided into the following steps:

(1) Establish the source Links between database and target database

(2) Export data in Oracle database as SQL file

(3) Import SQL file into MySQL database

(4 ) Modify the converted MySQL database to adapt to the original business needs.

3. Common Oracle to MySQL conversion tools

When converting Oracle to MySQL, you can use some third-party tools to simplify the conversion process. The following are some common tools:

(1) SQLines

SQLines tool can convert Oracle table structure and data into MySQL format, supports most Oracle features and functions, and also Can output MySQL DDL scripts and data files. SQLines also provides the function of custom mapping mode, allowing users to customize the data type mapping relationship between Oracle and MySQL.

(2)Oracle SQL Developer Migration Assistant for MySQL

Oracle SQL Developer is a free database development tool. The Migration Assistant for MySQL function can quickly convert Oracle database tables to Data is migrated to MySQL. Migration Assistant for MySQL also provides mapping functions for data types and table constraints, and can support the conversion of Oracle tables such as intensive, typical, and partition types.

4. Common MySQL to Oracle conversion tools

When converting MySQL to Oracle, you can also use some third-party tools to simplify the conversion process. The following are some common tools:

(1)ESF Database Migration Toolkit

ESF Database Migration Toolkit can connect MySQL and Oracle databases through ODBC for data transfer between the two databases . It can easily transfer tables, indexes, flip-flops, triggers, stored procedures and other data between two databases.

(2) SQLines Data

SQLines Data is another tool developed by SQLines, which can convert MySQL table structure and data into Oracle format. SQLines Data supports most MySQL features and functions, and can also output Oracle's DDL scripts and data files.

5. Issues that need attention during the conversion process

When converting between Oracle and MySQL, special attention needs to be paid to the following issues:

(1) Data Different mapping relationships of types: The mapping relationships of some data types are different between Oracle and MySQL. For example, Oracle's DATE type is mapped to DATETIME type in MySQL, and you need to pay attention to the accuracy of the converted data type.

(2) Limits of tables and indexes: The maximum limits of tables and indexes are different between Oracle and MySQL. It is necessary to ensure that the converted data does not exceed the maximum limits of MySQL.

(3) SQL syntax: There are some differences in SQL syntax between Oracle and MySQL, and you need to check the accuracy of the converted SQL statement.

In short, Oracle and MySQL are both very popular database management systems. They each have their own advantages and disadvantages, and have different applications in different business scenarios. When converting between Oracle and MySQL, you need to carefully familiarize yourself with the differences between the two systems and the conversion process, choose the conversion tool that suits you, and have enough precautions to ensure the integrity and accuracy of the converted data. .

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