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Transferring Data with ETL

Extraction From MySQL’s Binary Log

Explore techniques to extract data from MySQL's binary log using Python's BinLogStreamReader. Learn to filter insert, update, and delete events from specific tables and export them as CSV files for ETL processes. Understand how transaction logs help database recovery and synchronization.

We'll cover the following...

Most popular relational database management system (RDBMS) solutions keep a log file of all changes to the database, including changes due to data manipulation language (DML) statements such as INSERT, UPDATE, and DELETE, as well as data definition language (DDL) statements such as CREATE and DROP.

Each database calls this log file by a different name, but all serve the same purpose.

  • In Microsoft SQL Server, the log file is called the transaction log.

  • In Oracle, the log file is called the redolog.

  • In PostgreSQL, the log file is called the write-ahead log (WAL).

  • In MySQL, the log file is called the binary log or binlog. We’ll explore this log file in detail in this lesson.

Why do we need a log file?

These log files are useful in case of database crashes and help keep the ...