Operators start with $:
- Comparison:
$gt,$gte,$lt,$lte,$ne,$in,$nin - Logical:
$and,$or,$not - Elements:
$exists; arrays:$all,$size; text:$regex
MongoDB Query Operators
Comparison and logical operators.
✍️ 2 exercises in this lessonKey Takeaways: MongoDB Query Operators
Mastering MongoDB Query Operators helps you write clean and reliable MongoDB code. Follow standard conventions, test edge cases, and keep logic simple. Try running the code example below and complete the exercises to build confidence.
MongoDB Query Operators Code Example
MongoDB// Marks of 80 or more
db.students.find({ marks: { $gte: 80 } })
// From Lahore OR Karachi
db.students.find({ city: { $in: ["Lahore", "Karachi"] } })
// Name starts with "S"
db.students.find({ name: { $regex: "^S" } })Output
[ { name: 'Ali', marks: 81, ... }, { name: 'Sara', marks: 94, ... } ]
[ { name: 'Ali', ... }, { name: 'Sara', ... } ]
[ { name: 'Sara', ... } ]
Run this example on your own computer. The "Get Started" lesson shows how to set it up.
MongoDB Query Operators Practice Exercises
Check what you learned in “MongoDB Query Operators”.
/ 2 solved
Fill in the blank
Find prices greater than 1000.
db.products.find({ price: { : 1000 } })
✓ Correct!
Not quite. Try again.
Multiple choice
Which operator matches any value in a list?
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