Mongodb: Difference between revisions
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* OR | * OR | ||
{"$or": [{"firstName": "Michael"}, {"firstName": "Tom"}]} | {"$or": [{"firstName": "Michael"}, {"firstName": "Tom"}]} | ||
* To remove all documents that do not have a certain value: | |||
db.inventory.remove( { type : { $ne: "food" } } ) | |||
* To remove all documents that do not have a range of values: | |||
db.inventory.remove( { type : { $nin: ["Apple", "Mango"] } } ) | |||
Revision as of 14:51, 27 January 2020
Installation
UI tools =
- MongoDB_Admin
git clone https://github.com/hatamiarash7/MongoDB_Admin cd MongoDB_Admin npm start &
- Robo 3T
~/apps/robo3t/bin/robo3t &
Querying
- OR
{"$or": [{"firstName": "Michael"}, {"firstName": "Tom"}]}
- To remove all documents that do not have a certain value:
db.inventory.remove( { type : { $ne: "food" } } )
- To remove all documents that do not have a range of values:
db.inventory.remove( { type : { $nin: ["Apple", "Mango"] } } )