- Trending Categories
- Data Structure
- Networking
- RDBMS
- Operating System
- Java
- MS Excel
- iOS
- HTML
- CSS
- Android
- Python
- C Programming
- C++
- C#
- MongoDB
- MySQL
- Javascript
- PHP
- Physics
- Chemistry
- Biology
- Mathematics
- English
- Economics
- Psychology
- Social Studies
- Fashion Studies
- Legal Studies
- Selected Reading
- UPSC IAS Exams Notes
- Developer's Best Practices
- Questions and Answers
- Effective Resume Writing
- HR Interview Questions
- Computer Glossary
- Who is Who
Set regex in MongoDB $in?
Let us create a collection with documents −
> db.demo675.insertOne({ ... "ListOfNames":["John","Chris","David"]}); { "acknowledged" : true, "insertedId" : ObjectId("5ea3f5b404263e90dac943ef") } > db.demo675.insertOne({ "ListOfNames":["Bob","Johnson","Sam"]}); { "acknowledged" : true, "insertedId" : ObjectId("5ea3f5c804263e90dac943f0") } > db.demo675.insertOne({ "ListOfNames":["Jace","Sam"]}); { "acknowledged" : true, "insertedId" : ObjectId("5ea3f5d304263e90dac943f1") }
Display all documents from a collection with the help of find() method −
> db.demo675.find();
This will produce the following output −
{ "_id" : ObjectId("5ea3f5b404263e90dac943ef"), "ListOfNames" : [ "John", "Chris", "David" ] } { "_id" : ObjectId("5ea3f5c804263e90dac943f0"), "ListOfNames" : [ "Bob", "Johnson", "Sam" ] } { "_id" : ObjectId("5ea3f5d304263e90dac943f1"), "ListOfNames" : [ "Jace", "Sam" ] }
Following is the query to query with regexp and array −
> db.demo675.find({"ListOfNames": {$in:[/John/,/J/]}});
This will produce the following output −
{ "_id" : ObjectId("5ea3f5b404263e90dac943ef"), "ListOfNames" : [ "John", "Chris", "David" ] } { "_id" : ObjectId("5ea3f5c804263e90dac943f0"), "ListOfNames" : [ "Bob", "Johnson", "Sam" ] } { "_id" : ObjectId("5ea3f5d304263e90dac943f1"), "ListOfNames" : [ "Jace", "Sam" ] }
Advertisements