How to select the first row of each group?

How to select the first row of each group?

sql scala apache-spark dataframe apache-spark-sql

sql

Concatenate columns in Apache Spark DataFrame

sql apache-spark dataframe apache-spark-sql

sql

Querying Spark SQL DataFrame with complex types

sql scala apache-spark dataframe apache-spark-sql

sql

Pyspark: Filter dataframe based on multiple conditions

sql filter pyspark apache-spark-sql pyspark-sql

sql

Including null values in an Apache Spark Join

sql scala apache-spark join apache-spark-sql

sql

What is the difference between cube, rollup and groupBy operators?

sql apache-spark apache-spark-sql cube rollup

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Spark Window Functions - rangeBetween dates

sql apache-spark pyspark apache-spark-sql window-functions

sql

Why Spark SQL considers the support of indexes unimportant?

sql apache-spark apache-spark-sql in-memory-database

sql

How to get other columns when using Spark DataFrame groupby?

sql apache-spark dataframe apache-spark-sql

sql

What is the difference between rowsBetween and rangeBetween?

sql apache-spark pyspark apache-spark-sql window-functions

sql

how to get max(date) from given set of data grouped by some fields using pyspark?

sql apache-spark pyspark apache-spark-sql pyspark-sql

sql

Explode (transpose?) multiple columns in Spark SQL table

sql apache-spark apache-spark-sql hiveql

sql

Understanding spark physical plan

sql apache-spark query-optimization apache-spark-sql catalyst

sql

How to group by time interval in Spark SQL

sql apache-spark apache-spark-sql

sql

Spark SQL window function with complex condition

sql apache-spark pyspark apache-spark-sql window-functions

sql