# Layerbase walkthrough video: migrations, branching, DuckDB and agents > A hands-on tour of Layerbase on video: moving off MongoDB Atlas and Supabase, preview branches for Vercel, MongoDB to PostgreSQL conversion, cross-database DuckDB queries, the CLI and desktop app, and a coding agent driven from a phone. Published: 2026-11-11 Canonical: https://layerbase.com/blog/layerbase-walkthrough-video I recorded a walkthrough of Layerbase that covers most of what the product does, in the order I would show it to someone sitting next to me. It runs a little over 20 minutes. **[Watch the Layerbase walkthrough on YouTube](https://www.youtube.com/watch?v=_luj4Z3sRL8)** Every chapter below links to its spot in the video, and most of them also link to a written post that goes further than a demo can. If you only care about one part, jump to it. ## Contents - [Engines and branching](#engines-and-branching) - [Moving off MongoDB Atlas](#moving-off-mongodb-atlas) - [A database branch for every Vercel preview](#a-database-branch-for-every-vercel-preview) - [MongoDB to PostgreSQL](#mongodb-to-postgresql) - [Leaving Supabase without losing your users](#leaving-supabase-without-losing-your-users) - [One DuckDB query across four sources](#one-duckdb-query-across-four-sources) - [The CLI and the desktop app](#the-cli-and-the-desktop-app) - [A coding agent you talk to from your phone](#a-coding-agent-you-talk-to-from-your-phone) - [Plans, hibernation and dedicated servers](#plans-hibernation-and-dedicated-servers) ## Engines and branching [00:00](https://www.youtube.com/watch?v=_luj4Z3sRL8) is the short version of what Layerbase is: one account for 19 managed database engines, where 17 of them can be branched. A branch is a full copy of a database you can break without touching the original, and it is the thread that runs through the rest of the video. At [01:25](https://www.youtube.com/watch?v=_luj4Z3sRL8&t=85s) I show the part people tend not to expect: SQLite and DuckDB over the network. Both are embedded engines, a library that opens a file, so neither has a server you can connect to. Layerbase puts one in front of them, so a hosted SQLite or DuckDB database gets a connection string like any other. The written versions are [SQLite file to cloud database](/blog/sqlite-file-to-cloud-database) and [DuckDB from file to cloud](/blog/duckdb-file-to-cloud). ## Moving off MongoDB Atlas [02:24](https://www.youtube.com/watch?v=_luj4Z3sRL8&t=144s) is a live migration from MongoDB Atlas into DocumentDB, the MongoDB-compatible engine. You paste the Atlas connection string, the copy runs, and the report tells you what came across and what did not. Your application keeps its MongoDB driver. The step-by-step version, including the Network Access setting that trips most people up, is [Migrate from MongoDB Atlas to DocumentDB](/blog/migrate-mongodb-atlas-to-documentdb). If you are still deciding whether to leave, [MongoDB Atlas alternatives](/blog/mongodb-atlas-alternative) covers prices and the cases where you should stay. ## A database branch for every Vercel preview [04:55](https://www.youtube.com/watch?v=_luj4Z3sRL8&t=295s) connects GitHub and Vercel to a production database, a staging branch and preview branches. Every preview deployment gets its own database branch with the connection string injected, so two pull requests running migrations at the same time stop stepping on each other. Written up in [A database branch for every Vercel preview](/blog/vercel-preview-database-branches). For the MongoDB side of branching specifically, see [Branching with MongoDB](/blog/branching-with-mongodb). ## MongoDB to PostgreSQL At [08:41](https://www.youtube.com/watch?v=_luj4Z3sRL8&t=521s) the same MongoDB data becomes PostgreSQL tables. The conversion proposes a schema and the relationships between collections, you review and edit that mapping, and only then does it copy. Verification runs before you switch anything over. This is the one I would read before trying: [Convert MongoDB to PostgreSQL with a mapping you can review](/blog/mongodb-to-postgresql-reviewed-conversion). ## Leaving Supabase without losing your users [10:43](https://www.youtube.com/watch?v=_luj4Z3sRL8&t=643s) migrates a Supabase project, including the `auth` schema. The rows in `auth.users` come across with their bcrypt password hashes untouched, so nobody has to reset a password, and they show up in the Auth console on the new database. The thing to know is that Layerbase does not run Supabase's login service for you. Your users and their hashes are there, and you add a small sign-in route against them. [Migrating from Supabase to Layerbase](/blog/migrating-from-supabase-to-layerbase) walks through both halves. ## One DuckDB query across four sources [12:31](https://www.youtube.com/watch?v=_luj4Z3sRL8&t=751s) is my favorite part. A single DuckDB query joins a MariaDB table, a PostgreSQL table, a CSV file and a JSON file, with no export step in between. Then a quick look at DuckLake, which keeps analytical tables as Parquet files in object storage with a PostgreSQL catalog. If DuckDB is new to you, start with [What developers should know about DuckDB](/blog/what-developers-should-know-about-duckdb). The DuckLake details are in [Introducing DuckLake on Layerbase](/blog/introducing-ducklake-on-layerbase). ## The CLI and the desktop app [14:52](https://www.youtube.com/watch?v=_luj4Z3sRL8&t=892s) leaves the cloud and runs databases locally, first with the [Layerbase CLI](https://layerbase.com/docs/cli) and then with [Layerbase Desktop](https://layerbase.com/desktop/download). Local databases branch too, which is handy when you want to try a destructive migration on your laptop before anyone else sees it. [Branching any database](/blog/branching-any-database) covers the local workflow. ## A coding agent you talk to from your phone [16:42](https://www.youtube.com/watch?v=_luj4Z3sRL8&t=1002s) is Agent Servers. An Agent Server is a small Linux machine that stays on, with your repositories and your coding agent already set up. In the video I use voice mode on my phone to ask the agent for a code change, then have it open a pull request and merge it. The longer explanation, including which agents work and what they cost, is in [How to vibe code from your phone](/blog/vibe-code-from-your-phone). ## Plans, hibernation and dedicated servers [19:55](https://www.youtube.com/watch?v=_luj4Z3sRL8&t=1195s) goes through the flat-rate plans, how an idle database hibernates and wakes on the next connection, the always-on setting for databases that should never sleep, and dedicated servers for when you want a machine to yourself. Current numbers live on the [pricing page](/pricing) and the [dedicated pricing page](/pricing/dedicated), since they change faster than a video can. [Sleep vs pause vs archive](/blog/sleep-vs-pause-vs-archive) explains the idle behavior in detail. The wrap-up at [21:52](https://www.youtube.com/watch?v=_luj4Z3sRL8&t=1312s) is short. If something in the video is not covered here or in the [docs](/docs), that is a gap I want to know about: [ops@layerbase.com](mailto:ops@layerbase.com). You can follow along on the Free plan. [Create a database](https://cloud.layerbase.com/create) and try whichever chapter caught your eye.