To answer this question, we need to understand the privileges related to updating comments on a sequence.

Option A) Control - This option is incorrect because the "Control" privilege does not specifically grant permission to update comments on a sequence.

Option B) Update - This option is incorrect because the "Update" privilege typically refers to the ability to update the actual data within a sequence, not the comments associated with it.

Option C) Usage - This option is incorrect because the "Usage" privilege generally refers to the ability to view or query the data within a sequence, not the ability to update comments.

Option D) Later - This option is correct because the "Later" privilege allows a user to update the comment on a sequence. This privilege specifically grants the ability to modify or update the comment associated with a sequence.

Therefore, the correct answer is Option D) Later. This option is correct because it grants the necessary privilege to update the comment on a sequence.

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• Wrong explanation

To answer this question, we need to understand the concept of privileges in a database.

In a database system, privileges are permissions that control the access and actions that users can perform on database objects. The Select Privilege specifically controls whether a user can retrieve data from a database object.

Let's go through each option to understand why it is correct or incorrect:

Option A) Sequence - Sequences in a database are used to generate unique numeric values. However, the Select Privilege does not apply to sequences as they do not store data that can be retrieved using the SELECT statement.

Option B) Schema - A schema is a logical container for database objects. It does not store data itself, but rather organizes and provides a namespace for objects. The Select Privilege does not apply to schemas because they do not store data to be retrieved.

Option C) Group - A group in a database is a logical collection of users. The Select Privilege cannot be controlled at the group level. Privileges are typically granted to individual users or roles, not groups.

Option D) View - A view is a virtual table that is derived from one or more tables or other views. It presents a subset of the data stored in the underlying tables. The Select Privilege can be controlled on a view because it determines whether a user can retrieve data from the view using the SELECT statement. This makes Option D the correct answer.

Therefore, the correct answer is Option D) View. The Select Privilege can be controlled on views to determine whether users can retrieve data from them.

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• Wrong explanation