AI RAG Database Chatbot Web App
The Challenge: While our organization possesses extensive data resources, many customer-facing staff members lack the time or technical expertise to query and analyse data independently. We needed a solution that would democratize access to our data warehouse, enabling non-technical employees to obtain quick, accurate answers to business questions without requiring SQL knowledge or data analysis skills. The Solution: I developed a Retrieval-Augmented Generation (RAG) AI chatbot web application that allows staff members to query our database using natural language. Users can ask questions conversationally and receive responses in their preferred format—either as csv format output for further analysis or as natural language summaries for immediate insights. Technical Implementation: • Flask web framework for lightweight, responsive web application delivery • SQLAlchemy ORM for secure database connectivity and query execution • LangChain SQL Database Agent to interpret natural language queries and generate syntactically correct SQL statements • Isolated database environment - automated scheduled Python scripts replicate relevant data warehouse tables to a separate database, preventing direct LLM access to production systems • Schema-aware prompting - the LLM receives database schema information and example queries to improve SQL generation accuracy • Conversational memory - implemented custom context management to maintain conversation history within token constraints by reformulating user questions to include relevant context from previous messages • Multi-format output - users can request data as structured CSV exports or conversational natural language responses Business Impact: This solution democratizes data access across the organization, enabling customer-facing teams to answer client questions in real-time without waiting for data analyst availability. The natural language interface eliminates the technical barrier to data exploration while maintaining security through database isolation.
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