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How to replace data from specific column only in spark scala

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How to replace some data from all column in dataframe in spark scala

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How to explode two column in hive

February 09, 2023

hive

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How to get increasing and decreasing sale in dataframe find via pyspark

February 09, 2023

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How to add new column of gender male as and female as 1

February 09, 2023

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How to add prefix in dataframe column for all via pyspark

February 09, 2023

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How to unpivot with two column via pyspark

February 09, 2023

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How to pivot table in pyspark

February 08, 2023

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How to connect mysql with pyspark and make some filters

February 08, 2023

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How to make balance of bank statement

February 06, 2023

sql

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How to explode the dataframe via pyspark

February 05, 2023

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How to sum two column country with dept in below table in json via pyspark

February 05, 2023

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Find average salary of employees for each department and order employees within a department by age.

February 05, 2023

sql

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Popular Post

Find Total working hours of each employee in a day through spark and scala

Find Total working hours of each employee in a day through spark and scala File name : epid.txt 1,"2020-12-30T09:00:00","IN" 1,"2020-12-30T13:00:00","OUT" 1,"2020-12-30T14:00:00","IN" 1,"2020-12-30T17:00:00","OUT" 1,"2020-12-30T17:30:00","IN" 1,"2020-12-30T20:00:00","OUT" 2,"2020-12-30T10:30:00","IN" 2,"2020-12-30T15:00:00","OUT" 2,"2020-12-30T16:30:00","IN" 2,"2020-12-30T21:30:00","IN" Solution : val schemax = new StructType() .add("eid",IntegerType,true) .add("ts",TimestampType,true) .add("event",StringType,true) val df = spark.read.format("csv").schema(schemax).load("file:///D:/epid.txt") df.show() df.printSchema() val unixtime = unix_timestamp(col("ts")) val pro = (unixtime-lag(unixtime,1).over(Window.partitionBy("eid&q

How to complex string data convert into dataframe via pyspark.

How to complex string data convert into dataframe via pyspark altimetric Input: Jack xxxx ["BL", "ND"] John yyyy ["CH", "MB"] Output: +----+----+---+ | _1| _2| _3| +----+----+---+ |Jack|xxxx| BL| |Jack|xxxx| ND| |John|yyyy| CH| |John|yyyy| MB| +----+----+---+ Solve: dfjack = sc.textFile("file:////home/cloudera/jack.txt") dfjack.foreach(print) John yyyy ["CH", "MB"] Jack xxxx ["BL", "ND"] task1 = dfjack.map(lambda x : x.replace('["','')).map(lambda x:x.replace('"]','')).map(lambda x:x.replace('", "','-')).map(lambda x : x.replace(" ",",")) task1.foreach(print) Jack,xxxx,BL-ND John,yyyy,CH-MB splitdata = task1.map(lambda x:x.split(",")) splitdata.foreach(print) ['Jack', 'xxxx', 'BL-ND'] ['John', 'yyyy', 'CH-MB'] df = splitdata.toDF() df.show() +----+---

How to make balance of bank statement

How to make balance of bank statement coforge Input: Output: Solution: create table bank (TransactionDate varchar(20),AccName varchar(20),Type varchar(20),Amount integer); insert into bank values ("2017-01-01","Anvesh","CR",60000.00),("2017-02-01","Anvesh","DB",8000.00),("2017-03-01","Anvesh","CR",8000.00),("2017-04-01","Anvesh","DB",5000.00),("2017-01-01","Nupur","CR",10000.00),("2017-02-02","Nupur","CR",8000.00),("2017-03-03","Nupur","DB",8000.00) WITH balances AS ( SELECT AccName, TransactionDate, Type, Amount, SUM(CASE WHEN Type = 'DB' THEN -Amount ELSE Amount END) OVER (PARTITION BY AccName ORDER BY TransactionDate) AS AccBalance FROM bank ) SELECT TransactionDate, AccName, Type, Amount, balance FROM balances ORDER BY AccName, TransactionDat

Find below expected output through spark and scala

Find below expected output through spark and scala File Name : dxr.txt 11111,"2021-01-15",10 11111,"2021-01-16",15 11111,"2021-01-17",30 11112,"2021-01-15",10 11112,"2021-01-16",20 11112,"2021-01-17",30 Output Required : Solution : val schemax = new StructType() .add("sensorid",IntegerType,true) .add("timestamp",TimestampType,true) .add("values",IntegerType,true) val df = spark.read.format("csv").schema(schemax).load("file:///D:/dxr.txt") df.show() df.printSchema() val dx = df.withColumn("tx",lead("values",1).over(Window.partitionBy("sensorid") orderBy("timestamp"))) dx.show() val dr = dx.withColumn("diff",col("tx")-col("values")) .filter(col("tx").isNotNull) .drop("values","tx") .withColumnRenamed("diff","values") dr.show()

Hive Assignment

Hive Assignment incedo Input: 1) Create a database “Olympic”, then within this database create a table “player” in following structure: pid: Int, pname: String, gender: String, age: Int, height: Int, eid: Int Note: create the partition on “gender” column. 2) Create a table “event” within this database in following structure: eid: Int, ename: String, year: Int, season: String, city: String Note: create the partition on “season” column and bucketing on “year” column. 3) Write a query to insert data into two table from two text files “player.txt” and “event.txt” respectively. 4) Do the query on the following scenarios: a. List the players details who not participated in Olympic event. b. List the number of players participated in each event c. List the number of Male and Female Players participated in event d. List down number of players participated in Beijing Olympic, e. List down player details who have highest age and joined in Olympic Event. f. Find out the play

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