An SQLite database file is created without a file extension when we create it from an Android application. The database header format contains information to show it is an SQLite file, like SQLite for...
An SQLite database file is created without a file extension when we create it from an Android application. The database header format contains information to show it is an SQLite file, like SQLite format 3\000. We only need the SQLite format for humans or some operating systems to recognize the file type properly.
If SQLite coded to the current specification encounters a version 1 or 2 database file where the write version is greater than 2, the file must be treated read-only. A database file cannot be read or written if its read version is greater than 2.
SQLite can set aside a small number of bytes at the end of every page for extensions. For example, the Encryption Extension uses these bytes to store a nonce or checksum per page. The 1-byte integer at offset 20 is the number of reserved bytes per page.
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SQLite3 Command Line Shell
DB Browser for SQLite
SQLiteStudio