Michael Patterson created SPARK-20456:
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Summary: Document major aggregation functions for pyspark
Key: SPARK-20456
URL: https://issues.apache.org/jira/browse/SPARK-20456
Project: Spark
Issue Type: Documentation
Components: Documentation
Affects Versions: 2.1.0
Reporter: Michael Patterson
Document `sql.functions.py`:
1. Document the common aggregate functions (`min`, `max`, `mean`, `count`,
`collect_set`, `collect_list`, `stddev`, `variance`)
2. Rename columns in datetime examples.
3. Add examples for `unix_timestamp` and `from_unixtime`
4. Add note to all trigonometry functions that units are radians.
5. Document `lit`
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