> ## Documentation Index > Fetch the complete documentation index at: https://docs.astrobee.ai/llms.txt > Use this file to discover all available pages before exploring further. # Quickstart > Build a data layer and ask questions about your data in minutes In this quickstart, you'll load demo e-commerce data, watch AstroBee build a semantic data layer, and ask business questions in plain English—all in under 10 minutes. **Prerequisites**: [Create an account](https://app.astrobee.ai) and sign in before you begin. ## Load Demo Data After signing in, you'll land on the **Data Hub**. For new accounts, AstroBee offers demo datasets to help you explore the platform. Data Hub with demo data options Click **Basic E-Commerce** to load a pre-configured dataset with: * **Customers** — Customer information and purchase history * **Products** — Product catalog with categories and pricing * **Orders** — Transaction records linking customers to products Loading demo data Once loaded, AstroBee automatically: 1. **Analyzes patterns** in your data columns (e.g., ID formats, email patterns) 2. **Discovers linkages** between tables (e.g., `orders.customer_id` → `customers.customer_id`) ## Explore Your Data Click on any table to preview its data and see discovered patterns: Table detail view ### Pattern Analysis AstroBee automatically identifies patterns in your columns. Click the pattern icon next to a column to see details: Column patterns Pattern analysis helps AstroBee understand your data semantics and suggest appropriate entity mappings. ## Build Your Data Layer Navigate to **Data Layer** in the sidebar. This is where you define how your business concepts map to your raw data. ### Connect Data Sources 1. Click the **Sources** tab 2. Click **Connect** next to your E-Commerce data source Sources tab ### Generate with AI Click **Generate Data Layer from selected Sources**. AstroBee's AI will ask a few questions to understand your business: Generation questionnaire Select your answers and AstroBee will: 1. Analyze your connected data sources 2. Identify entities (Customer, Product, Order, OrderItem) 3. Map relationships between them 4. Bind entities to source tables Generation complete ### Review the Graph Switch to the **Data Layer** tab to see your entities visualized: Data layer graph The graph shows: * **Customer** (dimension) — Individual customers * **Product** (dimension) — Products in your catalog * **Order** (fact) — Customer transactions * **OrderItem** (bridge) — Line items linking orders to products ### Review and Publish Click **Review** to see all pending changes before publishing: Review panel Click **Publish all pending changes** to make your data layer active. ## Ask Questions With your data layer published, you're ready to ask questions! Click **New Chat** in the sidebar. New chat Type a question in plain English: ``` How many customers do we have? ``` Chat response ### View the SQL Click **SQL** to see the exact query AstroBee generated: SQL view ### Understand the Logic Click **Logic** to see how AstroBee reasoned through your question: Logic view ### Full Report Click **Full Report** for a complete breakdown: Full report ## Try More Questions Now explore your data with more questions: ``` What are our top 5 products by total revenue? ``` ``` Show me customers who have placed more than 2 orders ``` ``` What's the average order value by product category? ``` Each answer shows the SQL and logic, so you always understand how AstroBee arrived at the result. ## Next Steps Connect your own data sources—files, databases, or business tools Learn more about editing and versioning your data layer Explore charts, exports, and advanced query features Query your data from Claude Desktop or VS Code **Need help?** Contact us at [hello@astrobee.ai](mailto:hello@astrobee.ai).