diff --git a/_questions/data-engineering-zoomcamp/module-6/062_c2c5634e36_cast-timestamp-ntz-to-bigint-spark.md b/_questions/data-engineering-zoomcamp/module-6/062_c2c5634e36_cast-timestamp-ntz-to-bigint-spark.md
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+---
+id: c2c5634e36
+question: Why does casting TIMESTAMP_NTZ to BIGINT fail in Spark, and how can I convert
+  it to a numeric value?
+sort_order: 62
+---
+
+TIMESTAMP_NTZ cannot be cast directly to numeric types like BIGINT in Spark. To convert to a numeric representation (epoch seconds), use the to_unix_timestamp function.
+
+```sql
+SELECT to_unix_timestamp(tpep_pickup_datetime)
+FROM yellow_2025_11
+```
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