add surrealdb

technology/applications/development/SurrealDB.md

@@ -0,0 +1,49 @@
+---
+obj: application
+website: https://surrealdb.com
+repo: https://github.com/surrealdb/surrealdb
+---
+
+# SurrealDB
+SurrealDB is a powerful, cloud-native, multi-model database built for modern application development. It supports relational, document, graph, vector, and real-time data access, all via a unified SQL-like query language called SurrealQL. There is also a GUI called Surrealist.
+
+## Multi-Model Support
+- **Relational**: Traditional table structure with foreign key-like linking.
+- **Document**: JSON-based records with schema-less flexibility.
+- **Graph**: Native support for linked data using edges and nodes.
+- **Vector**: Built-in similarity search for AI/ML use cases.
+- **Real-time**: Subscriptions and change feeds.
+- **Time-Series & Search**: Native support for time-ordered and full-text queries.
+
+## SurrealQL
+SurrealQL blends the familiarity of SQL with document/graph features.
+
+```sql
+-- Create a user
+CREATE user:john SET name = 'John Doe', email = 'john@example.com';
+
+-- Read a record
+SELECT * FROM user:john;
+
+-- Create a relationship (graph)
+RELATE user:john->friend->user:jane;
+
+-- Search by text
+SELECT * FROM article WHERE content CONTAINS 'database';
+
+-- Vector similarity search
+SELECT * FROM embeddings WHERE vector <-> [0.1, 0.2, 0.3] LIMIT 3;
+```
+
+## Compose
+
+```yml
+services:
+    surrealdb:
+        ports:
+            - 80:8000
+        volumes:
+            - /local-dir:/container-dir
+        image: surrealdb/surrealdb:latest
+        command: start --user root --pass root rocksdb:/container-dir/mydatabase.db
+```