20. alias(), asc(), desc(), cast() & like() functions on Columns of dataframe in PySpark | #PySpark

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In this video, I discussed about alias(), asc(), desc(), cast() & like() functions which are useful while working with dataframe columns.

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Комментарии
Автор

Thankyou so much for uploading pyspark videos . I have a request sir . Please do upload full series in pyspark . Thankyou sir.

penchalaprasadsusarla
Автор

Hi, I am trying to sort a data frame based on Sal and I want to keep the sorted output in a new column. I am trying to achieve this withcolumns and sort but getting an error. My scenario is,

id, name, sal
1, 'a', 1000
2, 'b', 2000

Required Output

id, name, sal, sorted_sal
1, 'a', 1000, 2000
2, 'b', 2000, 1000

Tried like this but not working,
df.withColumn('sorted_sal;, df.sort(df.sal.desc()))

chittaranjanpradhan
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So, alias will be same as withcolumn_renamed. Please let me know when should use alias and when should we use withcolumn_renamed?

sumanthb