How do we select and organize multiple employee profile columns in a single projection?
Passing multiple Column references into select() to define the precise schema structure for downstream tasks.
Preparing clean feature matrices for machine learning and filtering enterprise ERP feeds.
from pyspark.sql.functions import col
df.select(
col("emp_id"),
col("first_name"),
col("last_name"),
col("salary")
).show()Practice typing production-grade PySpark code for Multi-Column Structured Projection.