Is not condition in MongoDB?
MongoDB provides different types of logical query operators and $not operator is one of them. This operator is used to perform logical NOT operation on the specified operator expressions and select or retrieve only those documents that do not match the given operator expression.
Is not equal in MongoDB?
MongoDB provides different types of comparison operators and inequality or not equals operator( $ne ) is one of them. This operator is used to select those documents where the value of the field does not equal to the given value. You can use this operator in methods like find() , update() , etc.
What are logical operators in MongoDB?
It is used to join query clauses with a logical AND and return all documents that match the given conditions of both clauses. It is used to join query clauses with a logical OR and return all documents that match the given conditions of either clause.
Which is not application of MongoDB?
MongoDB should not be used in applications that require table joins simply because it doesn’t support joins (like in SQL). This is attributed to the fact that the data stored in MongoDB is not structured and therefore, performing joins is a highly time-consuming process that may lead to slow performance.
How do I use $Not in MongoDB?
$not is MongoDB’s implementation of the NOT logical operator that exists in most database technologies. You can use it with any other query expression such as less than ($lt), greater than ($gt), or equal to ($eq). In short it returns anything but the documents that match the inner condition.
How do you write not equal to in MongoDB?
$ne selects the documents where the value of the field is not equal to the specified value . This includes documents that do not contain the field .
What is GTE and LT in MongoDB?
Comparison Operators Matches if values are greater than the given value. $lt. Matches if values are less than the given value. $gte. Matches if values are greater or equal to the given value.
Which are the arithmetic operators in MongoDB?
Arithmetic Expression Operators
| Name | Description |
|---|---|
| $multiply | Multiplies numbers to return the product. Accepts any number of argument expressions. |
| $pow | Raises a number to the specified exponent. |
| $round | Rounds a number to to a whole integer or to a specified decimal place. |
| $sqrt | Calculates the square root. |
Where is MongoDB not suitable?
MongoDB would not be well suited for applications that need: Multi-Object Transactions: MongoDB only supports ACID transactions for a single document. SQL: SQL is well-known and a lot of people know how to write very complex queries to do lots of things.