These features make QLDB a great fit for banking & finance, e-commerce, transportation & logistics, HR & payroll, manufacturing, and government applications, and many other use cases that need to maintain the integrity and history of stored data.
In Amazon QLDB, the underlying journal stores an immutable record of all committed transactions, including query statements and data definition commands. The journal's transaction history can be exported into an Amazon Simple Storage Service (Amazon S3) bucket and accessed for auditing purposes.
Amazon Aurora PostgreSQL does not keep a permanent, immutable record of changes. Instead, that history must be generated as audit data and stored outside of the database.
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