How can we join two tables without using Source qualifier override or Joiner

To answer this question, we need to understand the different methods to join two tables in an ETL (Extract, Transform, Load) process without using a Source Qualifier Override or Joiner transformation.

Option A) Using lookup override - This option is correct. Lookup transformation can be used to join two tables without using a Joiner or Source Qualifier Override. By configuring the lookup transformation to perform a join operation, you can match records from the main table with the lookup table based on a common key. This allows you to retrieve the required data from the lookup table and combine it with the main table.

Option B) Cannot join tables without using Joiner or Source Qualifier Override - This option is incorrect. While Joiner and Source Qualifier Override are commonly used methods to join tables in an ETL process, there are alternative methods available, such as using a lookup transformation or SQL transform.

Option C) Using user-defined option in source qualifier - This option is correct. The Source Qualifier transformation in ETL tools often provides a user-defined option that allows you to write custom SQL queries to join tables. This option enables you to specify the join condition and retrieve the required data from multiple tables without using a Joiner or Source Qualifier Override.

Option D) Using SQL Transform - This option is incorrect. The SQL Transform is not specifically designed for joining tables. It is used to perform SQL operations on data, such as filtering, grouping, or aggregating. While it is possible to write custom SQL queries in an SQL Transform to join tables, it is not a direct method for joining tables without using a Joiner or Source Qualifier Override.

Therefore, the correct answer is A,C. These options explain valid methods to join two tables without using a Source Qualifier Override or Joiner transformation.

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