Data & Analytics

Supabase Database & Realtime

Build on Supabase PostgreSQL with auto-generated APIs, realtime subscriptions, and edge functions.

Claude Code Cursor Copilot Windsurf Gemini CLI

Overview

Supabase provides a complete backend platform built on PostgreSQL, offering auto-generated REST and GraphQL APIs, realtime subscriptions via WebSockets, file storage, edge functions, and authentication. The JavaScript client library provides a fluent query builder that generates SQL queries automatically, with full TypeScript support through generated types.

The query builder supports filtering, sorting, pagination, and joining across tables using foreign key relationships. Realtime subscriptions allow clients to listen for INSERT, UPDATE, and DELETE events on specific tables or rows, enabling live dashboards, chat applications, and collaborative features. Row Level Security (RLS) policies ensure that realtime events respect access control rules.

Supabase edge functions run on Deno Deploy, providing serverless compute close to users. The platform includes built-in support for vector embeddings (pgvector), full-text search, database webhooks, and cron jobs. Database migrations are managed through the Supabase CLI, which provides a local development environment that mirrors production. The platform is open source and can be self-hosted.

Who Is This For?

Build a CRUD API without writing backend code
Implement realtime subscriptions for live data updates
Set up Row Level Security for multi-tenant applications
Generate TypeScript types from your database schema

Installation

Setup for Claude Code

npm install @supabase/supabase-js

Configuration

import { createClient } from "@supabase/supabase-js"

const supabase = createClient(
  process.env.SUPABASE_URL!,
  process.env.SUPABASE_ANON_KEY!
)

// Query with filters
const { data, error } = await supabase
  .from("posts")
  .select("*, author:users(name)")
  .eq("published", true)
  .order("created_at", { ascending: false })
  .limit(10)

// Realtime subscription
supabase.channel("posts").on("postgres_changes",
  { event: "INSERT", schema: "public", table: "posts" },
  (payload) => console.log("New post:", payload.new)
).subscribe()