> ## Documentation Index > Fetch the complete documentation index at: https://ventstream.dev/docs/llms.txt > Use this file to discover all available pages before exploring further. # SurrealDB live sync > Postgres → VentStream → SurrealDB, streaming into your browser. surreal-demo.ventstream.dev — no signup, nothing to install. Every card on that page is a **composed document in SurrealDB**: an order row joined with its customer and its items, kept in sync by VentStream as three normalized Postgres tables change. Your browser holds a SurrealDB `LIVE SELECT` over a WebSocket — no polling, no replay. When a document changes, SurrealDB pushes it to you the moment VentStream writes it. ## What to try 1. **Place an order.** Your click gets a tag like `#7f3k`. The button writes plain SQL to Postgres — and the composed document comes back through the whole pipeline carrying your tag, with the measured commit-to-browser latency next to it. Typically under half a second. 2. **Boost a customer's tier** (left panel). This updates **one row** in the `customers` table — and every order document embedding that customer re-composes at once. Those cards flash blue: that's join fan-out, the hard part of keeping denormalized views honest. 3. **Cancel an order.** The delete tombstones through and the card fades out. 4. Watch the terminal in the header: those are the actual SQL statements hitting Postgres, including yours. ## How it works ``` your click ──▶ Postgres ──CDC──▶ VentStream ──▶ SurrealDB ──LIVE SELECT──▶ your browser 3 normalized joins them 1 composed tables into documents document per order ``` The pipeline is declared in one config: a Postgres source, a [joins spec](/docs/guides/authoring-specs) composing `orders` + `customers` + `order_items`, and a [SurrealDB sink](/docs/connectors/sinks/surrealdb). The engine runs **fleet-managed** — the same demo you're clicking is a pipeline in our own dashboard, deployed with an agent key like any customer workload. The browser connects as a SurrealDB user with a read-only `VIEWER` role; writes only ever flow through the pipeline. ## Run this yourself The [SurrealDB sink guide](/docs/connectors/sinks/surrealdb) walks the same shape from zero: provision, one config file, one command, live documents.