Worked on enhancing cross-version compatibility for date truncation in the tobymao/sqlglot repository, focusing on ClickHouse SQL generation. Addressed discrepancies in DateTrunc handling by introducing version-aware logic that normalizes unit strings and aligns function names with specific ClickHouse releases. Refactored code to delegate datetrunc_sql to timestamptrunc_sql, reducing duplication and simplifying future maintenance. Expanded unit testing to validate date_trunc outputs across multiple ClickHouse versions, improving regression safety and reliability. Utilized Python, SQL, and database management skills to streamline code paths, remove obsolete helpers, and ensure consistent behavior, ultimately supporting broader adoption and reducing runtime errors in production environments.