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mongoimport:tldr:596dd
The given command is used to import data into a MongoDB database using the mongoimport tool.
Here is the breakdown of the command:
-
mongoimport
: This is the command itself, invoking the mongoimport tool to perform the import operation. -
--file=${filename-json}
: Specify the path or filename of the JSON file from which the data will be imported.${filename-json}
is a placeholder for the actual JSON file you want to import. -
--mode=${select}
: This option indicates the mode of import.${select}
is another placeholder, which should be replaced with one of the available modes: 'insert', 'upsert', 'merge', or 'upsertReplace'.-
'insert' mode inserts new documents to the collection.
-
'upsert' mode checks if a document already exists with the specified fields (defined by --upsertFields), and if found, updates the document; otherwise, it inserts a new document.
-
'merge' mode merges the imported documents with the existing documents in the collection, either updating the fields of existing documents or inserting new documents.
-
'upsertReplace' mode replaces existing documents if found based on the --upsertFields; otherwise, it inserts new documents.
-
-
--upsertFields="${field1,field2,---}"
: This option specifies the fields used to determine if a document already exists during an upsert operation. "${field1,field2,---}" is a placeholder for the fields separated by commas. The tool will check for the existence of a document based on these fields before deciding whether to update or insert.
Make sure to replace the placeholders with the actual values before executing the command.