To hide a column in a row in Oracle, you can use the SELECT statement to exclude the column from the result set. Instead of selecting all columns using "*", specify the columns you want to display explicitly in the SELECT statement. This will exclude the hidden column from the output while displaying the rest of the columns in the row. Alternatively, you can also use an alias for the column you want to hide in the SELECT statement, effectively obscuring its original name in the output.
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How to hide a column in a row while still allowing it to be referenced in queries in oracle?
You can hide a column in a row in Oracle by setting its visibility to hidden using the ALTER TABLE statement. This will prevent the column from being displayed when the table is queried, but it can still be referenced in queries.
Here is an example of how to hide a column in Oracle:
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ALTER TABLE table_name MODIFY column_name HIDDEN;
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Replace table_name with the name of your table and column_name with the name of the column you want to hide.
After running this statement, the column will still be accessible for use in queries but will not be displayed when selecting data from the table.
What is the best way to document hidden columns in oracle for future reference?
One of the best ways to document hidden columns in Oracle for future reference is to create a metadata document or data dictionary that includes information about the hidden columns. This document should contain details such as the table name, column name, data type, purpose, and any notes or explanations about why the column is hidden.
Additionally, it is helpful to include information about any applications or processes that use the hidden column, as well as any potential impacts on reporting or data analysis. Keeping this documentation up to date and easily accessible will ensure that future developers or analysts have the information they need to work with the hidden columns effectively.
How to hide a column that contains sensitive information in oracle?
To hide a column that contains sensitive information in Oracle, you can use Virtual Private Database (VPD) or Label Security.
- Virtual Private Database (VPD): VPD enables you to create security policies to control access to specific rows or columns of a table based on user authentication or other criteria. You can create a security policy that restricts access to the sensitive column for certain users or roles.
- Label Security: Oracle Label Security provides more fine-grained control over data access by allowing you to create security policies based on labels or categories. You can classify columns as sensitive and apply labels to users or roles to control access to those columns.
Both VPD and Label Security offer a more secure and flexible approach to hiding sensitive information in Oracle databases compared to simply hiding the column in a query or using row-level security. It is recommended to consult with a database administrator or security expert to implement the most appropriate solution for your specific requirements.
