[FAQ Bot] NEW: How do you share a DataFrame across multiple Spark sessions?

_questions/machine-learning-zoomcamp/general/114_db219fef17_spark-global-temp-views.md

@@ -0,0 +1,19 @@
+---
+id: db219fef17
+question: How do you share a DataFrame across multiple Spark sessions?
+sort_order: 114
+---
+
+Spark provides **Global Temporary Views** to share DataFrames across different Spark sessions within the same Spark application.
+Unlike regular temporary views, global temporary views are accessible from any session.
+**Step 1: Create a Global Temporary View**
+```python
+# Create a global temporary view
+df.createOrReplaceGlobalTempView('trips_global')
+```
+This registers the DataFrame as a global temporary view named `trips_global`.
+**Step 2: Query the Global View from Any Session**
+```python
+spark.sql("SELECT * FROM global_temp.trips_global").show()
+```
+Global temporary views are stored in the `global_temp` database and must be referenced using the `global_temp.` prefix.