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Virtual columns in AWS Hive are created using expressions that are evaluated during runtime and do not store data directly.
To utilize a virtual column in Azure Pyspark SQL, you can replicate the expression used to create the virtual column in Hive as a new column using Pyspark SQL syntax. For example, if the virtual column is created using a simple arithmetic expression:
ALTER TABLE mytable ADD COLUMNS (virtualcol INT AS (col1 + col2));
You can replicate this expression in Azure Pyspark SQL as:
SELECT col1, col2, (col1 + col2) as virtualcol from mytable;
By replicating the expression directly, you create a similar virtual column in Pyspark SQL that can be further manipulated or used for analysis.