Reference

ACCDB (Access)

ACCDB is the database file format Microsoft Access has used since Access 2007. A single .accdb holds an entire desktop database — tables, queries, forms, and reports — replacing the older MDB format.

Files & formatsWindowsGeneral

ACCDB (Access)

Also known as: .accdb file, Microsoft Access database, Access 2007 format

Microsoft Access database format since 2007
Holds tables, queries, forms, and reports in one file
Successor to legacy MDB; export tables to CSV

What ACCDB contains

Unlike a spreadsheet, an Access .accdb packs a whole relational database into one file: the data tables plus the queries, forms, reports, and macros that make up the application around them.

ACCDB is the successor to the legacy MDB format and added features like multivalued fields and attachments. It is the default for modern Access databases.

Opening and exporting

Microsoft Access opens .accdb natively. Without Access, you typically export tables to CSV or Excel, or migrate the data into another database engine.

File size grows with the data and embedded attachments; Access offers a compact-and-repair step to shrink bloated databases. For sharing data, exporting to CSV is the simplest route.

Related terms

Keep reading the reference.

Files & formatsMDB (Access)MDB is the legacy Microsoft Access database format used before Access 2007, built on the Jet engine. A .mdb holds a full desktop database in one file and was replaced by the newer ACCDB format.WindowsGeneral Files & formatsCSVCSV (comma-separated values) is a plain-text format that stores tabular data as rows of values separated by commas. It carries no formatting, formulas, or charts, which makes CSV files tiny and universally readable across apps and programming languages.General Files & formatsSQLiteSQLite is a self-contained database that stores an entire database — tables, indexes, and data — in a single file, typically ending in .sqlite, .sqlite3, or .db. Countless apps embed it to hold their data locally, which is why a SQLite file is often where an app’s settings, history, and content live.General Web & SEOStructured data (schema markup)Structured data is machine-readable code, usually written in JSON-LD using the schema.org vocabulary, that labels what a page is about — an article, product, recipe, or FAQ. Search engines use it to understand content and to power rich results like star ratings and FAQ dropdowns.General