What is a database cursor?

  1. A cursor is SQL keyword specifying a retrieved data order.

  2. Cursor is acronym for Current Set Of Records and is a database object pointing to a currently selected set of records.

  3. A blinking vertical line that indicates the location of the next input on the display screen.

  4. None of the above.


Correct Option: B
Explanation:

To solve this question, the user needs to have some understanding of databases and their operations.

Option A: This option is incorrect. The SQL keyword that specifies the order of retrieved data is "ORDER BY" and not "cursor."

Option B: This option is correct. A cursor is a database object that points to a currently selected set of records. It allows you to retrieve and manipulate data row by row. The term "cursor" comes from the idea of a cursor in a text editor, which is a movable indicator that shows where the next action will occur.

Option C: This option is incorrect. The blinking vertical line that indicates the location of the next input on the display screen is called a "cursor," but it is not related to database operations.

Option D: This option is incorrect because option B is the correct answer.

Therefore, The Answer is: B.

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