0These operators help you update a value only if the new value is smaller ($min) or larger ($max) than the current one. This keeps your data accurate without extra checks.
db.collection.updateOne(
{ <filter> },
{ $min: { <field1>: <value1>, ... } }
)
// or
db.collection.updateOne(
{ <filter> },
{ $max: { <field2>: <value2>, ... } }
)
// or both together
db.collection.updateOne(
{ <filter> },
{ $min: { <field1>: <value1>, ... }, $max: { <field2>: <value2>, ... } }
)You can use $min and $max together or separately in the same update.
If the current field value is missing, $min and $max will set it to the given value.
db.players.updateOne(
{ name: "Alice" },
{ $min: { score: 50 } }
)db.weather.updateOne(
{ city: "Paris" },
{ $max: { temperature: 30 } }
)db.products.updateOne(
{ productId: 123 },
{ $min: { price: 100 }, $max: { highPrice: 200 } }
)This example inserts a player Bob with scores, then updates his highScore only if 90 is higher, and lowScore only if 15 is lower.
db.scores.insertOne({ player: "Bob", highScore: 80, lowScore: 20 })
// Try to update highScore to 90 only if it's higher
// Try to update lowScore to 15 only if it's lower
db.scores.updateOne(
{ player: "Bob" },
{ $max: { highScore: 90 }, $min: { lowScore: 15 } }
)
// Find the updated document
db.scores.findOne({ player: "Bob" })If the field does not exist, $min and $max will create it with the given value.
These operators only work with numbers, dates, and strings that can be compared.
They do not replace the value if the condition is not met, so your data stays safe.
$min updates a field only if the new value is smaller than the current one.
$max updates a field only if the new value is larger than the current one.
Use them to keep track of minimum or maximum values easily without extra code.
$min update operator do in MongoDB?$min$min operator updates a field only if the new value is smaller than the current value stored in that field.$max updates if the new value is larger, and other options do not match the behavior of $min.$min updates only if smaller [OK]$max to update the field score to 90 in MongoDB?{ $operator: { field: value } }. So $max must be followed by an object with field and value.{ _id: 1, highScore: 80 }, what will be the document after applying db.collection.updateOne({_id:1}, { $max: { highScore: 75 } })?$max operator updates the field only if the new value is greater than the current value. Here, current highScore is 80, new value is 75.$max updates only if new value is larger [OK]db.collection.updateOne({_id: 2}, { $min: { age: 30 } }) but it does not update the document. What could be the reason?$min update condition$min updates the field only if the new value is smaller than the current value.age is already less than 30, the update will not change the document. Other options are incorrect because $min does not require arrays, the syntax is correct, and the question states the update runs but no change occurs.$min updates only if new value smaller [OK]minTemp and maxTemp. Which update operation correctly updates both fields when a new temperature temp is 15?minTemp to update only if the new temperature is lower, so use $min. For maxTemp, update only if new temperature is higher, so use $max.$min for minTemp and $max for maxTemp. { $max: { minTemp: 15 }, $min: { maxTemp: 15 } } and { $min: { maxTemp: 15 }, $max: { minTemp: 15 } } swap operators incorrectly. { $set: { minTemp: 15, maxTemp: 15 } } always sets both fields to 15, ignoring previous values.Pass the test and this pattern moves unknown strong while earning +1 Grip toward your certificate.