pyspark convert dataframe column from timestamp to string of “YYYY-MM-DD” format

问题

In pyspark is there a way to convert a dataframe column of timestamp datatype to a string of format 'YYYY-MM-DD' format?

回答1:

If you have a column with schema as

root
 |-- date: timestamp (nullable = true)

Then you can use from_unixtime function to convert the timestamp to string after converting the timestamp to bigInt using unix_timestamp function as

from pyspark.sql import functions as f
df.withColumn("date", f.from_unixtime(f.unix_timestamp(df.date), "yyyy-MM-dd"))

and you should have

root
 |-- date: string (nullable = true)

回答2:

You can use date_format function as below

from pyspark.sql.functions import date_format

df.withColumn("dateColumn",  date_format(col("vacationdate"), "yyyy-MM-dd"))

Hope this helps!

回答3:

from pyspark.sql.functions  import date_format

df.withColumn("DateOnly", date_format('DateTime', "yyyy-MM-dd")).show()

来源：https://stackoverflow.com/questions/48910511/pyspark-convert-dataframe-column-from-timestamp-to-string-of-yyyy-mm-dd-format