In MariaDB, CHAR() is a built-in string function that returns characters based on their code values.
CHAR() accepts one or more integers. It then returns a string consisting of the characters given by the code values of those integers.
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How CHR() Works in MariaDB
In MariaDB, CHR() is a built-in string function that returns a character based on the code values provided as an argument.
MongoDB sort()
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.
MongoDB $orderBy
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.
MongoDB $sort
In MongoDB, the $sort aggregation pipeline stage sorts all input documents and returns them to the pipeline in sorted order.
MongoDB $switch
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 $mergeObjects
In MongoDB, the $mergeObjects aggregation pipeline operator combines multiple documents into a single document.
MongoDB $isArray
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.