Writing SQL queries is straightforward, but creating a reliable system for running them efficiently is complex and often results in poor data quality and operational inefficiencies. Transitioning from ad-hoc scripts to a structured, spec-driven architecture enhances reproducibility, validation, and observability of SQL jobs, ultimately leading to better management of data and costs.

Effective data quality evaluation is essential for making informed decisions and involves a six-step framework. By defining clear goals, ensuring appropriate data sources, identifying anomalies, and using data observability tools, individuals can enhance the trustworthiness of their data and avoid the pitfalls of poor data quality.