設有兩個dataframe:df1,df2
如果df3=df1.join(df2,df1.device_number=df2.device_number,"inner")
df3就會出現兩個相同列 device_number
此時改成df3=df1.join(df2,“device_number”,"inner")
就只有一個device_number了
如果想多列key則
df.join(df4, ['name', 'age'])
設有兩個dataframe:df1,df2
如果df3=df1.join(df2,df1.device_number=df2.device_number,"inner")
df3就會出現兩個相同列 device_number
此時改成df3=df1.join(df2,“device_number”,"inner")
就只有一個device_number了
如果想多列key則
df.join(df4, ['name', 'age'])
文章目錄 • 1 sortBy • 2 glom • 3 cartesian • 4 groupBy • 5 pipe • 6 foreach • 7 foreachPartition •