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# SQLite integration
The SQLite integration combines SQLite's transactional storage with TsFile's
compression for historical time-series data. Applications read and write through
a logical table: mutable data stays in SQLite, while sealed data is stored in
TsFile and remains queryable through the same table.
## Features
- Create a writable table with a declared schema, or initialize one from an
existing TsFile.
- Seal data into TsFile through SQL. Sealed rows remain readable but cannot be
updated or deleted.
- Query an existing TsFile as a read-only table.
- Export a table to an independent TsFile, including its hot data.
## Documentation and source
For build instructions, SQL examples, and transaction semantics, see the user
guides:
- [English user guide](https://github.com/apache/tsfile/blob/experiment-sqlite/cpp/src/sqlite/USER_GUIDE_EN.md)
- [中文使用手册](https://github.com/apache/tsfile/blob/experiment-sqlite/cpp/src/sqlite/USER_GUIDE.md)
- [Source code](https://github.com/apache/tsfile/tree/experiment-sqlite/cpp/src/sqlite)
- [Mailing-list discussion](https://lists.apache.org/thread/62oqkfo2nmojhrhfnrb1rhhwn4vcykw6)