Joining Multiple Spark Dataframes

0 votes
I have 'n' Spark Data-frames like this:

list(d1,d2,d3,d4,.....dn)

How can i join these 'n' Data-frames together?
Mar 26, 2018 in Big Data Hadoop by Ashish
• 2,650 points
1,884 views

1 answer to this question.

0 votes

You can run the below code to join those 'n' spark data-frames:

List(df1,df2,df3,dfN).reduce((a, b) => a.join(b, joinCondition))
answered Mar 26, 2018 by Bharani
• 4,620 points
Hi Bharani, Can you please explain a little bit. How are trying to achieve this.

Related Questions In Big Data Hadoop

0 votes
1 answer

How to read Spark elements having multiple lines each?

Try this: val new_records = sc.newAPIHadoopRDD(hadoopConf,classOf[ ...READ MORE

answered Dec 12, 2018 in Big Data Hadoop by Omkar
• 69,090 points
546 views
–1 vote
1 answer

How to use multiple spark version?

You can use the  SPARK_MAJOR_VERSION for this. Suppose ...READ MORE

answered Dec 27, 2018 in Big Data Hadoop by Omkar
• 69,090 points
673 views
–1 vote
1 answer

Spark multiple version without major version

Yes. It is not necessary to set ...READ MORE

answered Dec 27, 2018 in Big Data Hadoop by Omkar
• 69,090 points
132 views
0 votes
1 answer

How to merge two Spark DataFrames?

Hi@akhtar, You can perform join operation in spark. ...READ MORE

answered Sep 17, 2020 in Big Data Hadoop by MD
• 95,060 points
72 views
0 votes
1 answer

How to sync Hadoop configuration files to multiple nodes?

For syncing Hadoop configuration files, you have ...READ MORE

answered Jun 21, 2018 in Big Data Hadoop by HackTheCode
514 views
+1 vote
1 answer
+1 vote
2 answers
0 votes
1 answer

What do we exactly mean by “Hadoop” – the definition of Hadoop?

The official definition of Apache Hadoop given ...READ MORE

answered Mar 16, 2018 in Big Data Hadoop by Shubham
941 views
+1 vote
1 answer

Hadoop Mapreduce word count Program

Firstly you need to understand the concept ...READ MORE

answered Mar 16, 2018 in Data Analytics by nitinrawat895
• 11,380 points
6,820 views
0 votes
1 answer

hadoop.mapred vs hadoop.mapreduce?

org.apache.hadoop.mapred is the Old API  org.apache.hadoop.mapreduce is the ...READ MORE

answered Mar 16, 2018 in Data Analytics by nitinrawat895
• 11,380 points
1,092 views