Queries vs. Filters

Queries vs. Filters

I can’t see any description of when I should use a query or a filter or some combination of the two. What is the difference between them? Can anyone please explain?

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Solr vs. ElasticSearch [closed]

Solr vs. ElasticSearch [closed]

What are the core architectural differences between these technologies?
Also, what use cases are generally more appropriate for each?

Solutions/Answers:

Solution 1:

Update

Now that the question scope has been corrected,

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