Answer
A collection is a group of documents similar to a table in relational databases but without a fixed schema.
Quick Answer
A collection is a group of documents in MongoDB - roughly equivalent to a table in SQL. But unlike SQL tables, collections have no enforced schema by default - documents in the same collection can have different fields. Collections are created automatically when you insert the first document. You query and index at the collection level.
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SugharaIQ Editorial Team
Verified Answer
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Source: SugharaIQ