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• Aggregation Framework Operators >
• String Aggregation Operators

String Aggregation Operators

Name	Description
$concat	Concatenates two strings.
$strcasecmp	Compares two strings and returns an integer that reflects the comparison.
$substr	Takes a string and returns portion of that string.
$toLower	Converts a string to lowercase.
$toUpper	Converts a string to uppercase.

• $concat (aggregation)
• $strcasecmp (aggregation)
• $substr (aggregation)
• $toLower (aggregation)
• $toUpper (aggregation)

• ←   $subtract (aggregation)
• $concat (aggregation)  →