SQLazy Tool Simplifies Complex SQL Interval Grouping with Plain-Language Steps

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SQLazy is a query tool that allows developers to express complex SQL logic using plain business language instead of writing nested queries manually. The tool was demonstrated using an event table scenario where consecutive rows sharing the same value must be merged into time intervals, with each interval ending when a new value group begins. Users define logic in four readable steps — sorting, segmenting, aggregating, and computing end timestamps — which SQLazy then compiles into production-ready native SQL. The generated Oracle-syntax query handles window functions like LAG and LEAD, NULL edge cases, and group boundaries automatically. The approach aims to reduce manual debugging effort and make interval-based data modeling more accessible to non-expert SQL users.

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