[大数据]Hive10---explode拆分多行

Intro

????hive explode操作

import pyspark

from pyspark.sql import SparkSession
# 创建SparkSession对象，调用.builder类
# .appName("testapp")方法给应用程序一个名字；.getOrCreate()方法创建或着获取一个已经创建的SparkSession
spark = SparkSession.builder.appName("pysaprk").getOrCreate()
import pyspark.sql.functions

df = spark.createDataFrame([(1, "A,B"),
                            (2, "C,D"),
                            (3, "E")],
                           ["id", "split_str"])

df.show(20,truncate=False)

+---+---------+
|id |split_str|
+---+---------+
|1  |A,B      |
|2  |C,D      |
|3  |E        |
+---+---------+

df.createOrReplaceTempView("temp")

split_str拆分多行

sql = """
select id,split_str,explode(split(split_str,',')) as letter
from temp
"""

spark.sql(sql).show()

+---+---------+---+
| id|split_str|col|
+---+---------+---+
|  1|      A,B|  A|
|  1|      A,B|  B|
|  2|      C,D|  C|
|  2|      C,D|  D|
|  3|        E|  E|
+---+---------+---+

????????????????????????????????2022-03-29 于南京市江宁区九龙湖

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