how does mongodb commands different from sql code example

Example: mongodb comparison

Name	Description
$eq		Matches values that are equal to a specified value.
$gt		Matches values that are greater than a specified value.
$gte	Matches values that are greater than or equal to a specified value.
$in		Matches any of the values specified in an array.
$lt		Matches values that are less than a specified value.
$lte	Matches values that are less than or equal to a specified value.
$ne		Matches all values that are not equal to a specified value.
$nin	Matches none of the values specified in an array.