embedded database



**from llm**

Yes — there are several **SQLite-like databases** that:

* ✅ Store everything in a **single file**
* ✅ Don’t require a central server
* ✅ Can store **BSON / document-style data** (instead of strict tables)

Here are the best options depending on what you want:

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## 1️⃣ **LiteDB** (Very close to what you described)

* Embedded
* Single `.db` file
* No server required
* Stores data as **BSON documents**
* Very similar to MongoDB API
* Great for .NET apps

If you're using C#, this is probably the cleanest choice.

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## 2️⃣ **MongoDB + Embedded Alternatives**

MongoDB itself requires a server, BUT there are embedded variants:

### 🔹 **Realm**

* Embedded
* Local file storage
* Document-style
* Good for mobile apps

### 🔹 **NeDB**

* Pure JS
* Stores data in a file
* Mongo-like API
* Good for Node.js apps

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## 3️⃣ **UnQLite**

Very interesting option:

* Embedded (like SQLite)
* Single file
* No server
* Key-value + document store
* JSON-like storage
* Written in C

This is probably the closest SQLite-style NoSQL engine.

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## 4️⃣ SQLite itself (with JSON)

Even regular **SQLite** supports:

* JSON columns
* JSON queries
* Single-file database
* Zero configuration

If you just need document-style storage without strict schema, SQLite + JSON might already be enough.

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# 🔎 Quick Comparison

| DB      | File-based | Serverless | BSON/Document   | Best For     |
| ------- | ---------- | ---------- | --------------- | ------------ |
| LiteDB  | ✅          | ✅          | ✅ BSON          | .NET apps    |
| UnQLite | ✅          | ✅          | ✅ JSON-like     | C / embedded |
| NeDB    | ✅          | ✅          | ✅ JSON          | Node.js      |
| SQLite  | ✅          | ✅          | JSON (not BSON) | General use  |

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If you tell me:

* What language you’re using
* Desktop / web / mobile?
* Approx data size?

I can give you a more precise recommendation.