In MongoDB, the $concat aggregation pipeline operator concatenates two or more strings and returns the concatenated string.
Category: DBMS
Database Management Systems
MongoDB $cmp
In MongoDB, the $cmp aggregation pipeline operator compares two values and returns either -1, 1, or 0, depending on whether the first value is less than, greater than, or equal to the first value.
MongoDB $floor
In MongoDB, the $floor aggregation pipeline operator returns the largest integer less than or equal to the specified number.
$floor accepts any valid expression that resolves to a number.
MongoDB $ceil
In MongoDB, the $ceil aggregation pipeline operator returns the smallest integer greater than or equal to the specified number.
$ceil accepts any valid expression that resolves to a number.
MongoDB $sqrt
In MongoDB, the $sqrt aggregation pipeline operator calculates the square root of a positive number and returns the result as a double.
$sqrt accepts any valid expression that resolves to a non-negative number.
MongoDB $tan
In MongoDB, the $tan aggregation pipeline operator returns the tangent of a value that is measured in radians.
$tan accepts any valid expression that resolves to a number.
The $tan operator was introduced in MongoDB 4.2.
MongoDB $sinh
In MongoDB, the $sinh aggregation pipeline operator returns the hyperbolic sine of a value that is measured in radians.
$sinh accepts any valid expression that resolves to a number.
The $sinh operator was introduced in MongoDB 4.2.
MongoDB $sin
In MongoDB, the $sin aggregation pipeline operator returns the sine of a value that is measured in radians.
$sin accepts any valid expression that resolves to a number.
The $sin operator was introduced in MongoDB 4.2.
MongoDB $pow
In MongoDB, the $pow aggregation pipeline operator raises a number to the specified exponent and returns the result
$pow accepts two expressions, supplied in an array. The first one is the number, and the second is the exponent. Both can be any valid expression, as long as they resolve to a number.
MongoDB $log10
In MongoDB, the $log10 aggregation pipeline operator calculates the log base 10 of a number and returns the result as a double.
$log10 accepts any valid expression that resolves to a non-negative number.
The $log10 operator was introduced in MongoDB 3.2.