Database / MongoDB Interview questions

Difference between SQL and No-SQL terminologies.

SQL Terms/Concepts.	MongoDB Terms/Concepts.
database.	database.
table.	collection.
row.	document or BSON document.
column.	field.
index.	index.
table joins.	$lookup, embedded documents.
primary key.	primary key.
Specify any unique column or column combination as primary key.	In MongoDB, the primary key is automatically set to the _id field.
aggregation (for example, group by).	aggregation pipeline.

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