Final answer:
Important columns for a Case table include Case ID, User ID, Status, Priority, Created Date, Resolved Date, Description, Category, and Assigned to. Reference qualifiers describe the type of data each column holds, ensuring data consistency and integrity.
Step-by-step explanation:
When designing a Case table in a database, important columns typically include Case ID, which serves as a unique identifier for each case, User ID or Contact ID to show which user or contact the case is associated with, Status to indicate the current status of the case (e.g., open, closed, pending), Priority to signify the urgency of the case, and Created Date and Resolved Date to track the timeline of the case. Additional columns may include Description or Summary to give an overview of the case's subject, Category or Type to classify the nature of the case, and Assigned to to designate which employee is responsible for handling the case.
Reference qualifiers for these columns are non-technical descriptions that detail what should be contained within the column. For instance, the Case ID column would have a reference qualifier that it is a unique alphanumeric code, the User ID might specify that it links to the user's table to draw their contact information, and Priority could be described as a list of predefined values (e.g., high, medium, low) that indicate the case's importance.