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.
Continue readingThis article presents 5 ways to return the seconds portion from a Date object in MongoDB.
Continue readingThis article presents 5 ways to return the minutes portion from a Date object in MongoDB.
Continue readingMongoDB 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.
Continue readingMongoDB provides various options for extracting date parts from a date.
This article presents 3 ways to return the week portion from a date in MongoDB.
Continue readingWhen extracting the day from a date, the exact option we use will depend on how we want the day to be represented.
For example, do we want the day of the week, the day of the month, or the day of the year? Or perhaps we want it in ISO 8601 format? The return value will usually be different depending on which one we choose.
This article explores those options, and therefore presents 8 ways to return the day portion from a date in MongoDB.
Continue readingMongoDB provides a number of aggregation pipeline operators for working with dates, including operators that extract certain parts of dates, such as the year, month, day, 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 month portion from a date in MongoDB.
Continue reading