apache-spark-sql

问题 I have a data frame in PySpark like below. import pyspark.sql.functions as func df = sqlContext.createDataFrame( [(0.0, 0.2, 3.45631), (0.4, 1.4, 2.82945), (0.5, 1.9, 7.76261), (0.6, 0.9, 2.76790), (1.2, 1.0, 9.87984)], ["col1", "col2", "col3"]) df.show() +----+----+-------+ |col1|col2| col3| +----+----+-------+ | 0.0| 0.2|3.45631| | 0.4| 1.4|2.82945| | 0.5| 1.9|7.76261| | 0.6| 0.9| 2.7679| | 1.2| 1.0|9.87984| +----+----+-------+ # round 'col3' in a new column: df2 = df.withColumn("col4",

问题 I have a data frame in PySpark like below. import pyspark.sql.functions as func df = sqlContext.createDataFrame( [(0.0, 0.2, 3.45631), (0.4, 1.4, 2.82945), (0.5, 1.9, 7.76261), (0.6, 0.9, 2.76790), (1.2, 1.0, 9.87984)], ["col1", "col2", "col3"]) df.show() +----+----+-------+ |col1|col2| col3| +----+----+-------+ | 0.0| 0.2|3.45631| | 0.4| 1.4|2.82945| | 0.5| 1.9|7.76261| | 0.6| 0.9| 2.7679| | 1.2| 1.0|9.87984| +----+----+-------+ # round 'col3' in a new column: df2 = df.withColumn("col4",

来源： https://stackoverflow.com/questions/64645788/in-a-scala-notebook-on-apache-spark-databricks-how-do-you-correctly-cast-an-arra

来源： https://stackoverflow.com/questions/64645788/in-a-scala-notebook-on-apache-spark-databricks-how-do-you-correctly-cast-an-arra

来源： https://stackoverflow.com/questions/64040759/cannot-resolve-column-name-given-input-columns-sparksql

来源： https://stackoverflow.com/questions/64040759/cannot-resolve-column-name-given-input-columns-sparksql

来源： https://stackoverflow.com/questions/64040759/cannot-resolve-column-name-given-input-columns-sparksql

来源： https://stackoverflow.com/questions/64040759/cannot-resolve-column-name-given-input-columns-sparksql

来源： https://stackoverflow.com/questions/64040759/cannot-resolve-column-name-given-input-columns-sparksql

来源： https://stackoverflow.com/questions/59404346/regex-replace-dot-characters-in-a-so-spark-dataframe-string-column