$gt¶

$gt¶

Syntax: {field: {$gt: value} }

$gt selects those documents where the value of the field is greater than (i.e. >) the specified value.

For most data types, comparison operators only perform comparisons on fields where the BSON type matches the query value’s type. MongoDB supports limited cross-BSON comparison through Type Bracketing.

Consider the following example:

db.inventory.find( { qty: { $gt: 20 } } )

This query will select all documents in the inventory collection where the qty field value is greater than 20.

Consider the following example that uses the $gt operator with a field from an embedded document:

db.inventory.update( { "carrier.fee": { $gt: 2 } }, { $set: { price: 9.99 } } )

This update() operation will set the value of the price field in the first document found containing the embedded document carrier whose fee field value is greater than 2.

To set the value of the price field in all documents containing the embedded document carrier whose fee field value is greater than 2, specify the multi:true option in the update() method:

db.inventory.update(
   { "carrier.fee": { $gt: 2 } },
   { $set: { price: 9.99 } },
   { multi: true }
)

参见

find(), update(), $set.

← $eq $gte →