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[NoSQL] Introduction to MongoDB(2)

3 minute read

MongoDB .distinct() - get unique values $elemMatch - filter documents that matches all the specified query criteria $regex - filter documents matchi...

[NoSQL] Introduction to MongoDB(1)

2 minute read

MongoDB Mongoclient.my_database.my_collection - access database & collection .count_documents() - count documents in collection .list_database_n...

[Python] Reshaping Data with pandas(4)

4 minute read

Pandas Using .stack with .mean() or .diff() .explode() - converts list contained column into separate rows pd.json_normalize() - converts json data ...