Difference between revisions of "MongoDB Delete"
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db.deptCollection.deleteOne({"deptno":40}) | db.deptCollection.deleteOne({"deptno":40}) | ||
| − | Note, if the query_criteria only returns one document, remove() and deleteOne() will have the same effect. | + | Note, if the query_criteria only returns one document, '''remove()''' and '''deleteOne()''' will have the same effect. |
| + | |||
| + | |||
| + | == Next Step == | ||
| + | |||
| + | This concludes the section on manipulating collections. Return to the workbook. | ||
Revision as of 13:14, 21 October 2016
Main Page >> MongoDB >>MongoDB Workbook >> Deleting a Document
Deleting a Document
At some stage you may want to delete a document from a collection. The format is:
db.collectionName.deleteOne(query_criteria) /* deletes the first document found that matches the query criteria */
db.collectionName.remove(query_criteria) /* deletes all documents found that matches the query criteria */
db.collectionName.remove() /* deletes all documents in a collection (use with care!) */
db.collectionName.drop() /* removes a collection (use with care!) */
Delete Department 40
Department 40 has closed down:
db.deptCollection.deleteOne({"deptno":40})
Note, if the query_criteria only returns one document, remove() and deleteOne() will have the same effect.
Next Step
This concludes the section on manipulating collections. Return to the workbook.
