The UpdateCursor class in ArcPy returns the error message, "RuntimeError: An expected Field was not found or could not be retrieved properly" when the TOP prefix is used as a SQL Clause to return only a specified number of records for a feature class or table in a SQL geodatabase.

附加信息

解决办法

The postfix 'ORDER BY' clause correctly functions which means the table list can be sorted in the returned result. After the list is sorted, use a while loop to iterate through and update each row a set number of times. For example, a while loop iterating up to 20 is used to only update the first 20 rows of the table that are already sorted. This simulates the same results as using the 'TOP 20' clause.

重现步骤