Answer: RETURN_ALL_ERRORS

The question specifically asks for the VALIDATION_MODE value that returns errors from all files in a COPY command, including files that were partially loaded during an earlier load. According to Snowflake documentation and the community discussion with consensus (100% of users selected D), RETURN_ALL_ERRORS is the correct option as it returns all errors across all files specified in the COPY statement, including files with errors that were partially loaded during an earlier load when ON_ERROR was set to CONTINUE. In contrast, RETURN_ERRORS returns all errors but does not specifically include files partially loaded from previous loads, making it less suitable for this scenario. RETURN_-1_ROWS and RETURN_n_ROWS are not relevant for error validation.

Author: LeetQuiz Editorial Team