ETL testing interview questions and answers | ETL with SQL #05

In this comprehensive video, we dive deep into real-time ETL testing with SQL interview questions. Learn the most common queries, techniques. Whether you're preparing for an interview or looking to level up your ETL skills, this tutorial has got you covered!.

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[sreyajose]

For the math subject only question an alternate query: select * from teachers where teacherid in (SELECT teacherid
FROM teachers group by teacherid having count(*)=1)
and subject = 'Math';