The correct answer is A. UPDATE. CompTIA DataSys+ classifies the UPDATE command as a Data Manipulation Language (DML) statement used to modify existing data within a table. When data is imported incorrectly—such as having wrong values, missing fields, or improperly formatted entries—the appropriate corrective action is to update the affected records rather than removing data structures or deleting records outright.
The UPDATE command allows a database administrator to correct specific columns or rows by setting them to the proper values while preserving the rest of the dataset. This aligns with DataSys+ best practices, which emphasize data integrity, minimal disruption, and precision when fixing data-related issues. By using a WHERE clause, the administrator can target only the incorrect records, reducing risk and avoiding unnecessary data loss.
Option B, DROP TABLE, is a DDL command that completely removes a table and all its data and structure. This is an extreme action and would not be appropriate when only certain data values are incorrect. Option C, DELETE, removes rows from a table, which may result in loss of valid data rather than correcting it. Deletion is only appropriate when data should no longer exist, not when it needs correction. Option D, ALTER TABLE, is also a DDL command used to modify table structure (such as adding or changing columns), not to fix incorrect row-level data.
CompTIA DataSys+ stresses the importance of choosing the least destructive and most targeted command when resolving data issues. Correcting imported data typically involves adjusting values rather than altering schema or removing data entirely.
Therefore, to fix incorrectly captured imported data while maintaining database integrity and availability, the administrator should use the UPDATE command, making option A the correct and fully verified answer.
