How to Query Changes Made by a Specific User in SQL

Querying Changes Made by a Specific User

Write a SQL query to retrieve changes made by a specific user in a temporal table.

Solution:

-- Retrieve changes made by UserA.
SELECT EmployeeID, Name, Position, SysStartTime, SysEndTime
FROM Employees
FOR SYSTEM_TIME ALL
WHERE ModifiedBy = 'UserA';

Explanation:

• Purpose of the Query :
• The goal is to demonstrate how to query changes made by a specific user in a temporal table.
• Key Components :
• FOR SYSTEM_TIME ALL: Retrieves all versions of rows.
• ModifiedBy = 'UserA': Filters for changes made by the specified user.
• Why Query User-Specific Changes? :
• Tracking user-specific changes supports accountability and auditing.
• It helps identify who made specific modifications.
• Real-World Application :
• In HR systems, querying user-specific changes tracks role adjustments.

Additional Notes:

• Include a ModifiedBy column in the table to track user activity.
• Use this query for compliance or forensic analysis.
• Important Considerations:
• Ensure that user tracking is implemented consistently.

For more Practice: Solve these Related Problems:

• Write a SQL query to retrieve changes made by a user named "AdminUser" in a temporal table named "Employees".
• Write a SQL query to identify modifications performed by a user named "DataEntry" in a temporal table named "Transactions".
• Write a SQL query to track updates made by a user named "HRManager" in a temporal table named "Salaries".
• Write a SQL query to list changes executed by a user named "SystemUser" in a temporal table named "Logs".

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Previous SQL Exercise: Migrating Data from a Non-Temporal Table to a Temporal Table.
Next SQL Exercise: Querying Changes Within a Specific Time Range.