MongoDB 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 readingCategory: DBMS
Database Management Systems
8 Ways to Get the Day from a Date in MongoDB
When 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 reading5 Ways to Get the Month from a Date in MongoDB
MongoDB 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 reading6 Ways to Get the Year from a Date in MongoDB
MongoDB provides quite a few aggregation pipeline operators for working with dates. This includes 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. This therefore allows you to use JavaScript to extract date values and date parts, etc from a field.
This article presents 6 ways to return the year portion from a date in MongoDB.
Continue readingList of MongoDB Date Operators, Methods, & Variables
This article contains a list of date operators, methods, and variables that you can use when working with dates in MongoDB.
Continue readingMongoDB $toUpper
In MongoDB, the $toUpper aggregation pipeline operator converts a string to uppercase and returns the result.
MongoDB $toLower
In MongoDB, the $toLower aggregation pipeline operator converts a string to lowercase and returns the result.
MongoDB $exists
In MongoDB, you can use the $exists element query operator to match documents that contain a specific field.
You can also use it to match documents that don’t contain a specific field.
You can also use it in conjunction with other operators such $nin to match documents where a given field exists, but it doesn’t contain a specific value.
MongoDB forEach()
In MongoDB, the cursor.forEach() method iterates the cursor to apply a JavaScript function to each document from the cursor.
MongoDB map()
In MongoDB, the cursor.map() method applies a function to each document visited by the cursor and combines the return values in an array.