In MongoDB, the $multiply aggregation pipeline operator multiplies numbers together and returns the result.
To use the $multiply operator, pass the numbers to the operator in an array.
The arguments can be any valid expression, as long as they resolve to numbers.
In MongoDB, you can use the $subtract aggregation pipeline operator to subtract numbers and/or dates.
In MongoDB, the $add aggregation pipeline operator adds values together. Such values can be numbers, or they can be numbers and a date.
The $add operator accepts the values as arguments. The arguments can be any valid expression as long as they resolve to either all numbers or to numbers and a date.
In MongoDB, the $anyElementTrue aggregation pipeline operator evaluates an array as a set and returns true if any of the elements are true.
If none of the elements is true, then it returns false.
An array’s element is true if it’s not false, null, 0, or undefined.
In MongoDB, the $allElementsTrue aggregation pipeline operator evaluates an array as a set and returns true if no element in the array is false.
If the array contains an element that is false, then $allElementsTrue returns false.
An array’s element is true if it’s not false, null, 0, or undefined.
MongoDB 4.4 introduced nine new aggregation pipeline operators, including two new operators for finding and replacing a substring.
The two new operators that allow you to find and replace a substring are the $replaceOne and $replaceAll operators.
This article presents 5 ways to return the milliseconds portion from a Date object in MongoDB.
This article presents 5 ways to return the seconds portion from a Date object in MongoDB.
This article presents 5 ways to return the minutes portion from a Date object in MongoDB.
MongoDB provides a good range of aggregation pipeline operators for working with dates, including operators that extract certain parts of dates, such as the year, month, day, hours, minutes, etc.
There are also a couple of MongoDB methods that enable you to iterate through a cursor, and apply a JavaScript function. You can therefore use JavaScript to extract date values and date parts, etc from a field as required.
This article presents 5 ways to return the hour portion from a Date object in MongoDB.