In MongoDB, the cursor.sort() method specifies the order in which the query returns matching documents.
The sort() method accepts a document that specifies the field to sort, and the sort order. The sort order can be either 1 for ascending or -1 for descending.
You can also specify { $meta: "textScore" } when doing $text searches, in order to sort by the computed textScore metadata in descending order.
In MongoDB, the $orderBy query modifier sorts the results of a query in ascending or descending order.
$orderBy accepts a document that specifies the field to sort, and the sort order. The sort order can be either 1 for ascending or -1 for descending.
$orderBy has been deprecated in the mongo shell since v3.2. Use the cursor.sort() method instead.
In MongoDB, the $sort aggregation pipeline stage sorts all input documents and returns them to the pipeline in sorted order.
In MongoDB, the $switch aggregation pipeline operator evaluates a series of case expressions, and executes a specified expression only when a case expression evaluates to true.
MongoDB provides a few operators that enable you to remove values from arrays.
These include:
$pull$pullAll$popIn MongoDB, the $mergeObjects aggregation pipeline operator combines multiple documents into a single document.
In MongoDB you can use the $isArray aggregation pipeline operator to check whether or not a value is an array.
It accepts any valid expression, and returns true if the expression is an array, false if it’s not.
In MongoDB, the $literal aggregation pipeline operator returns a value without parsing.
It accepts any valid expression, and returns the unparsed expression.
The $literal operator can be useful for when you have a value that MongoDB could inadvertently interpret as an expression, but you don’t want it to.
For example, if you have a monetary amount that includes a dollar sign, MongoDB might inadvertently interpret that as a field name. You can use $literal to prevent MongoDB from interpreting such expressions.
If you’ve got a partitioned table in SQL Server, and you now want to run a query that includes the partition number on each row returned by the query, you can use the $PARTITION system function to do just that.
The $PARTITION function returns the partition number into which a set of partitioning column values would be mapped for any specified partition function.
You can therefore use it in your SELECT statement to return the partition that each row belongs to.