Using subqueries in wdata
답변함Is it possible to use sub queries other than using the WITH clause and UNION? If so is there a special way to use sub queries?
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Hey Van McGregor
Apologies for the delayed response! I reached out to our internal team because this was outside the scope of my expertise. It sounds like you were able to connect with our support team and they referred you to Presto SQL documentation. Hope their input was helpful!
Thanks,
Ben
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Van McGregor @... Also looking for the answer to this
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Hi Katherine!
Thanks for the follow-up here. I have somewhat of an answer here.
It is possible to use subqueries in SQL without relying solely on the
WITHclause orUNION. Alternative methods include:1. Nesting: Use a subquery within the
SELECTstatement,WHEREclause, orFROMclause. This method allows for one level of nesting, where one query depends on the result of another (more info here: https://support.workiva.com/hc/en-us/articles/21592422886420-Can-I-use-a-query-as-a-source-for-another-query)2. Quantifiers for Comparison: Use subqueries with comparison operators and quantifiers such as
ALL,ANY, andSOMEto filter results based on specific conditions (more info here: https://support.workiva.com/hc/en-us/articles/360052323491-SQL-comparison-functions-and-operators)These approaches allow flexibility in how subqueries are structured within SQL statements. Let me know if you have any additional questions. Cheers!
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