March 2019
Intermediate to advanced
394 pages
11h 4m
English
Content preview from Mastering MongoDB 4.x - Second Edition
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Update operators
The following is a list of all update operators that MongoDB supports:
|
Name |
Description |
|
$inc |
This increments the value of the field by the specified amount. |
|
$mul |
This multiplies the value of the field by the specified amount. |
|
$rename |
This renames a field. |
|
$setOnInsert |
This sets the value of a field if an update results in an insert of a document. It has no effect on update operations and modifying existing documents. |
|
$set |
This sets the value of a field in a document. |
|
$unset |
This removes the specified field from a document. |
|
$min |
This only updates the field if the specified value is less than the existing field value. |
|
$max |
This only updates the field if the specified value ... |
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