PromptQL is a data agent that enables building AI assistants with natural language capabilities, connecting directly to existing data sources while maintaining granular role-based authorization and security. It uses AI to create structured query plans, executes them programmatically outside the LLM's context window, stores results in structured artifacts, and combines retrieval, computation, and AI reasoning in a predictable way. This approach delivers 5x better performance than traditional methods, with near-perfect repeatability even as tasks become more complex. PromptQL showcases its capabilities through a customer support assistant demo, demonstrating how it can query databases, access customer support tickets, and take actions using natural language, all set up in under 5 minutes.