Which BSON type comes first in the MongoDB comparison order during sort operations?

The BSON type that comes first in the MongoDB comparison order during sort operations is MinKey. MinKey is a special internal type in MongoDB that serves as a sentinel value. It is designed to represent the lowest possible value in a BSON comparison, making it a very useful tool for sorting.

When you perform a sort operation in MongoDB, the comparison order is defined in a way that MinKey will always come before other types. This means that if a document has a field with MinKey as its value, it will be the first one to be sorted in ascending order.

Understanding this order is crucial for developers because it impacts how queries behave, especially in scenarios where sorting may be involved or when handling comparisons in indexes. By knowing that MinKey has the lowest precedence, you can anticipate how your data will be organized during retrieval operations.

Other BSON types, such as numbers, null, and boolean values, are compared in subsequent order. However, since none of these types precede MinKey, they will appear later in the sort results.