PySpark filter : How to filter data in Pyspark – Multiple options explained.

PySpark @ Freshers.in

pyspark.sql.DataFrame.filter

PySpark filter function is used to filter the data in a Spark Data Frame, in short used to cleansing of data. Once filter is applied, we will get the dataframe with filtered data only. filter is applied on Data Frame with multiple conditions.

Sample Code

from pyspark.sql import SparkSession
from pyspark.sql.functions import col
spark = SparkSession.builder.appName("Filter-Sample @ Freshers.in ").getOrCreate()
emp_schema= ["name","id","age","gender","dept","state","salary","increment"]
emp_data = [("Sam",1010,30,"Male","IT","CT",125000,8.1),
("Peter",1020,32,"Male","HR","NY",90000,7.0),
("Tom",1030,34,"Male","IT","CT",85000,5.0),
("Joe",1040,55,"Male","HR","GA",60000,4.0),
("Barry",1050,34,"Male","IT","OR",95000,6.0),
("Mike",1060,42,"Male","SALES","OR",70000,4.0),
("Suzy",1070,34,"Female","IT","GA",99000,6.0),
("Annie",1080,54,"Female","SALES","GA",80000,3.0),
("Bush",1090,34,"Male","IT","AL",85000,5.0),
("Evan",1100,44,"Female","CRM","GA",75000,8.0)]
df = spark.createDataFrame(data=emp_data,schema=emp_schema)
df.show()
+-----+----+---+------+-----+-----+------+---------+
| name| id|age|gender| dept|state|salary|increment|
+-----+----+---+------+-----+-----+------+---------+
| Sam|1010| 30| Male| IT| CT|125000| 8.1|
|Peter|1020| 32| Male| HR| NY| 90000| 7.0|
| Tom|1030| 34| Male| IT| CT| 85000| 5.0|
| Joe|1040| 55| Male| HR| GA| 60000| 4.0|
|Barry|1050| 34| Male| IT| OR| 95000| 6.0|
| Mike|1060| 42| Male|SALES| OR| 70000| 4.0|
| Suzy|1070| 34|Female| IT| GA| 99000| 6.0|
|Annie|1080| 54|Female|SALES| GA| 80000| 3.0|
| Bush|1090| 34| Male| IT| AL| 85000| 5.0|
| Evan|1100| 44|Female| CRM| GA| 75000| 8.0|
+-----+----+---+------+-----+-----+------+---------+ 

#Pyspark filter by using & operator

filter_by_sal1_a = df.filter((df.salary > 85000) & (df.salary < 99000)).show()
+-----+----+---+------+----+-----+------+---------+
| name| id|age|gender|dept|state|salary|increment|
+-----+----+---+------+----+-----+------+---------+
|Peter|1020| 32| Male| HR| NY| 90000| 7.0|
|Barry|1050| 34| Male| IT| OR| 95000| 6.0|
+-----+----+---+------+----+-----+------+---------+

##Pyspark filter same as above but different syntax

filter_by_sal1_b = df.filter("salary > 85000 and salary < 99000").show()
+-----+----+---+------+----+-----+------+---------+
| name| id|age|gender|dept|state|salary|increment|
+-----+----+---+------+----+-----+------+---------+
|Peter|1020| 32| Male| HR| NY| 90000| 7.0|
|Barry|1050| 34| Male| IT| OR| 95000| 6.0|
+-----+----+---+------+----+-----+------+---------+

#Pyspark filter by using “or” operator – Syntax – 1

filter_by_sal2 = df.filter((df.salary == 85000) | (df.salary == 99000)).show()
+----+----+---+------+----+-----+------+---------+
|name| id|age|gender|dept|state|salary|increment|
+----+----+---+------+----+-----+------+---------+
| Tom|1030| 34| Male| IT| CT| 85000| 5.0|
|Suzy|1070| 34|Female| IT| GA| 99000| 6.0|
|Bush|1090| 34| Male| IT| AL| 85000| 5.0|
+----+----+---+------+----+-----+------+---------+

#Pyspark filter by using “or” and ‘col’ operator – Syntax – 2

filter_by_sal3_a = df.filter((col("salary") == 85000) | (col("salary") == 99000)).show()
+----+----+---+------+----+-----+------+---------+
|name| id|age|gender|dept|state|salary|increment|
+----+----+---+------+----+-----+------+---------+
| Tom|1030| 34| Male| IT| CT| 85000| 5.0|
|Suzy|1070| 34|Female| IT| GA| 99000| 6.0|
|Bush|1090| 34| Male| IT| AL| 85000| 5.0|
+----+----+---+------+----+-----+------+---------+

#Pyspark filter by using the expression in double quotes

filter_by_sal3_b = df.filter("salary == 85000 or salary == 99000").show()
+----+----+---+------+----+-----+------+---------+
|name| id|age|gender|dept|state|salary|increment|
+----+----+---+------+----+-----+------+---------+
| Tom|1030| 34| Male| IT| CT| 85000| 5.0|
|Suzy|1070| 34|Female| IT| GA| 99000| 6.0|
|Bush|1090| 34| Male| IT| AL| 85000| 5.0|
+----+----+---+------+----+-----+------+---------+

#Pyspark filter by using “between” operator

filter_by_sal4_a = df.filter(df.salary.between(85000,99000)).show()
+-----+----+---+------+----+-----+------+---------+
| name| id|age|gender|dept|state|salary|increment|
+-----+----+---+------+----+-----+------+---------+
|Peter|1020| 32| Male| HR| NY| 90000| 7.0|
| Tom|1030| 34| Male| IT| CT| 85000| 5.0|
|Barry|1050| 34| Male| IT| OR| 95000| 6.0|
| Suzy|1070| 34|Female| IT| GA| 99000| 6.0|
| Bush|1090| 34| Male| IT| AL| 85000| 5.0|
+-----+----+---+------+----+-----+------+---------+

#Pyspark filter by using between and orderBy desc operator

filter_by_sal4_b = df.filter(col("salary").between(85000,99000)).orderBy(df.salary.desc()).show()
+-----+----+---+------+----+-----+------+---------+
| name| id|age|gender|dept|state|salary|increment|
+-----+----+---+------+----+-----+------+---------+
| Suzy|1070| 34|Female| IT| GA| 99000| 6.0|
|Barry|1050| 34| Male| IT| OR| 95000| 6.0|
|Peter|1020| 32| Male| HR| NY| 90000| 7.0|
| Bush|1090| 34| Male| IT| AL| 85000| 5.0|
|Tom|1030| 34| Male| IT| CT| 85000| 5.0|
+-----+----+---+------+----+-----+------+---------+

#Pyspark filter by using between and orderBy asc operator

filter_by_sal4_b = df.filter(col("salary").between(85000,99000)).orderBy(df.salary.asc()).show()
+-----+----+---+------+----+-----+------+---------+
| name| id|age|gender|dept|state|salary|increment|
+-----+----+---+------+----+-----+------+---------+
|Bush|1090| 34| Male| IT| AL| 85000| 5.0|
|Tom|1030| 34| Male| IT| CT| 85000| 5.0|
|Peter|1020| 32| Male| HR| NY| 90000| 7.0|
|Barry|1050| 34| Male| IT| OR| 95000| 6.0|
|Suzy|1070| 34|Female| IT| GA| 99000| 6.0|
+-----+----+---+------+----+-----+------+---------+

#Pyspark filter by using multiple conditon

filter_by_sal_dept = df.filter(df.salary.between(85000,99000) & (df.dept == 'IT')).show()
+-----+----+---+------+----+-----+------+---------+
| name| id|age|gender|dept|state|salary|increment|
+-----+----+---+------+----+-----+------+---------+
| Tom|1030| 34| Male| IT| CT| 85000| 5.0|
|Barry|1050| 34| Male| IT| OR| 95000| 6.0|
| Suzy|1070| 34|Female| IT| GA| 99000| 6.0|
| Bush|1090| 34| Male| IT| AL| 85000| 5.0|
+-----+----+---+------+----+-----+------+---------+

External Link
Filter() Spark pageĀ 

Author: user

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