Hi, can someone explain how to accomplish UNION and UNION all in the tELT components in Talend?
My use case is to merge 2 tables into 1 that will have a sparse presentation.
e.g. Table A has ID and String1, String2 and Table B has ID and String1, String3.
The desired output table is ID, String1, String2, String3 with sparse results in String2 and String3.
The query in SQL looks like this:
SELECT ID, String1, String2, null as String3
SELECT ID, String1, null, String3
Are your two tables from one database or not when you are using ELT components?
For UNION or UNION ALL operations, it can be implemented by doing a join on tMap.
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