How to add and subtract time intervals in ClickHouse ®

ClickHouse® offers various methods for performing date arithmetic, which are essential for tasks like calculating retention periods, time-series comparisons, and filtering data by relative date ranges. Users can utilize helper functions such as addDays() and subtractMonths(), or opt for SQL-standard DATE_ADD and DATE_SUB functions, each with specific syntax and applicable scenarios. The guide highlights how ClickHouse® efficiently handles edge cases like leap years, month-end rollovers, and daylight saving transitions, providing reliable results across different time zones. It further discusses performance optimization techniques, such as avoiding implicit casts and using constant folding, to enhance query execution in high-volume data processing. Additionally, the text introduces Tinybird's managed ClickHouse® platform, which simplifies the deployment of real-time customer lifecycle analytics by abstracting the operational complexities associated with managing ClickHouse® infrastructure.