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Use NOT LIKE Operator in MongoDB
For this, use the $not operator in MongoDB. To understand the concept, let us create a collection with the document. The query to create a collection with a document is as follows −
> db.notLikeOperatorDemo.insertOne({"StudentName":"John Doe"}); { "acknowledged" : true, "insertedId" : ObjectId("5c8a29c393b406bd3df60dfc") } > db.notLikeOperatorDemo.insertOne({"StudentName":"John Smith"}); { "acknowledged" : true, "insertedId" : ObjectId("5c8a29cc93b406bd3df60dfd") } > db.notLikeOperatorDemo.insertOne({"StudentName":"John Taylor"}); { "acknowledged" : true, "insertedId" : ObjectId("5c8a29df93b406bd3df60dfe") } > db.notLikeOperatorDemo.insertOne({"StudentName":"Carol Taylor"}); { "acknowledged" : true, "insertedId" : ObjectId("5c8a2a1693b406bd3df60dff") } > db.notLikeOperatorDemo.insertOne({"StudentName":"David Miller"}); { "acknowledged" : true, "insertedId" : ObjectId("5c8a2a2693b406bd3df60e00") }
Display all documents from a collection with the help of find() method. The query is as follows −
> db.notLikeOperatorDemo.find().pretty();
The following is the output −
{ "_id" : ObjectId("5c8a29c393b406bd3df60dfc"), "StudentName" : "John Doe" } { "_id" : ObjectId("5c8a29cc93b406bd3df60dfd"), "StudentName" : "John Smith" } { "_id" : ObjectId("5c8a29df93b406bd3df60dfe"), "StudentName" : "John Taylor" } { "_id" : ObjectId("5c8a2a1693b406bd3df60dff"), "StudentName" : "Carol Taylor" } { "_id" : ObjectId("5c8a2a2693b406bd3df60e00"), "StudentName" : "David Miller" }
Here is the query to use NOT LIKE operator in MongoDB −
> db.notLikeOperatorDemo.find( { StudentName: { $not: /^John Taylor.*/ } } );
The following is the output −
{ "_id" : ObjectId("5c8a29c393b406bd3df60dfc"), "StudentName" : "John Doe" } { "_id" : ObjectId("5c8a29cc93b406bd3df60dfd"), "StudentName" : "John Smith" } { "_id" : ObjectId("5c8a2a1693b406bd3df60dff"), "StudentName" : "Carol Taylor" } { "_id" : ObjectId("5c8a2a2693b406bd3df60e00"), "StudentName" : "David Miller" } You can use the following query also: > db.notLikeOperatorDemo.find({StudentName: {$not: /John Taylor/}}); The following is the output: { "_id" : ObjectId("5c8a29c393b406bd3df60dfc"), "StudentName" : "John Doe" } { "_id" : ObjectId("5c8a29cc93b406bd3df60dfd"), "StudentName" : "John Smith" } { "_id" : ObjectId("5c8a2a1693b406bd3df60dff"), "StudentName" : "Carol Taylor" } { "_id" : ObjectId("5c8a2a2693b406bd3df60e00"), "StudentName" : "David Miller" }
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