multiway merge join pentaho - Wikitechy https://www.wikitechy.com/interview-questions/tag/multiway-merge-join-pentaho/ Interview Questions Sat, 11 Sep 2021 05:17:49 +0000 en-US hourly 1 https://wordpress.org/?v=6.9 https://www.wikitechy.com/interview-questions/wp-content/uploads/2025/10/cropped-wikitechy-icon-32x32.png multiway merge join pentaho - Wikitechy https://www.wikitechy.com/interview-questions/tag/multiway-merge-join-pentaho/ 32 32 How to perform database join with PDI (Pentaho Data Integration) ? https://www.wikitechy.com/interview-questions/uncategorized/how-to-perform-database-join-with-pdi-pentaho-data-integration/ https://www.wikitechy.com/interview-questions/uncategorized/how-to-perform-database-join-with-pdi-pentaho-data-integration/#respond Sat, 17 Jul 2021 22:03:26 +0000 https://www.wikitechy.com/interview-questions/?p=834

Database join with PDI

  • PDI supports combination of two tables form the same database using a ‘Table Input’ method performing the join in SQL only.
  • On the other side, for joining two tables in different databases, user implement ‘Database Join’ step.
  • Though in database join, each input row query executes on the target system from the main stream, ensuing in lower performance as the number of queries implement on the B increases.
  • To avoid the above issues, there is an another option to merge rows form two different Table Input steps.
  • We can also use ‘Merge Join ‘step, using the SQL query having ‘ORDER BY’ clause. Remember, the rows must be perfectly sorted before implementing merge join.
PDI join with database
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