Spring Data MongoDB Queries | Criteria queries | @Query Annotation | Aggregation with MongoTemplate

You will learn querying documents with Query and Criteria classes, regular expressions using $regex, and aggregation with MongoTemplate.
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[@sanyammadaan2396]

Great Work 👍

[@parthec1]

Thank u for video, i feel you need to explain the use case whihc you want to demo in video,then end use(group by case was not clear.

[@manideepkumar959]

wow u told lot many ,is there any complete list of when to use which, i felt it is small lecture, can u do big detailed lecture

[@technotowntechie9732]

Sure

[@sumitkaintura8366]

thanku

[@acessosan]

I would like to understand how do I compare two fields in the document. Has anyone ever needed to do this type of comparison? I'm using the criteria.
criteria.add(Criteria.where("this.campoC == this.campoD"));
Query query = new Query();
List criteria = new ArrayList();
criteria.add(Criteria.where("campoA").is(123));
criteria.add(Criteria.where("campoB").is("N"));
criteria.add(Criteria.where("this.campoC == this.campoD")); //

[@18potboy]

@GetMapping("/")
List compareName(@PathVariable(value = "name") String name,@PathVariable(value = "name2") String name2){
Query query = new Query();
query.addCriteria(Criteria.where(name).elemMatch(Criteria.where(name)));
return mongoTemplate.find(query,EmployeeModel.class);
}

[@swasb123]

Please share the sample code for this tutorial.

[@akshaychothe7391]

Increase your volume please

[@viratsuresh5946]

How to write case insensitive query

[@rual284]

Haven't seen any criteria queries...

[@laurencefinny7410]

explain update query

[@siddapure]

where is github link?

[@madantengale5574]

Can you please add this code into GitHub

[@shantanuverma331]

Can we use @Query for update also ??

[@technotowntechie9732]

In Spring Data JPA, the @Query annotation is typically used for defining custom queries for reading data from the database. While it's not intended for update operations, you can achieve update functionality using @Query in combination with the @Modifying annotation.