Potential Reasons for Incorrect Sorting

1. Data Type Mismatch:

   • Ensure that the lastmodifydate column is of a datetime or timestamp data type.
   • If the column is stored as a string (varchar or nvarchar), the sorting might be lexicographical instead of chronological, leading to incorrect order.

2. Incorrect Query:

   • Confirm that the query explicitly specifies ORDER BY lastmodifydate DESC.
   • Check if another part of the query or a different ORDER BY clause is overriding the intended sort order.

3. Indexes and Collation Issues:

   • If the column has a collation setting affecting sorting behavior, it might cause issues.
   • Ensure proper indexing on the lastmodifydate column to improve sorting efficiency and correctness.

4. NULL Values or Unexpected Data:

   • If there are NULL values in the column or unexpected values, it might affect the sorting. However, this shouldn't place the older record above the newer one unless explicitly handled.

Steps to Debug: