What are the rules for sorting in Elasticsearch?

The sorting rules in Elasticsearch are based on the values of specified fields in documents. Sorting can be done in either ascending or descending order.

When the sorting field is a numerical type, the sorting rule is based on the numerical value. If the field value is an integer, floating point number, or long integer type, the numerical sorting rule is used.

When the sorting field is of string type, the sorting rule follows alphabetical order. By default, sorting is based on Unicode code points. Different language analyzers can be used to define sorting rules according to specific language rules.

When the sorting field is of date type, the sorting rule is based on the order of dates and times. Different date formats can be used to define the sorting rule in order to sort based on a specific date format.

You can use the sort parameter in Elasticsearch’s query API to specify the sorting field and sorting order.