What is the sorting rule in SQL?

The sorting rules in SQL involve arranging query results based on specified sorting conditions. To specify the sorting rules, SQL uses the ORDER BY clause. The sorting can be done based on the values of one or multiple columns, and can be sorted in ascending (ASC) or descending (DESC) order.

By default, sorting is done in ascending order. For example, for a column of numbers, it is sorted from smallest to largest. For a column of characters, it is sorted in alphabetical or numerical order.

The sorting rules can be a simple column name, an expression, or a function. Multiple sorting criteria can be used, with the first one used to sort the main column and subsequent criteria used in case of rows with the same value.

It is worth noting that the sorting rules may vary for different database management systems, and the specific implementation can be determined based on the particular database system.