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In Oracle Database,to achieve transaction level consistency,which level of transaction isolation must be used?
Option Button
A control used in graphical user interfaces that allows the user to select one, and only one, choice from a predefined set of options.
Option Group
A group of related options displayed as checkboxes or radio buttons from which a user can make one or more selections in a user interface.
Combo Box
A GUI element that combines a drop-down list box and a text box, allowing users to select an item from a list or enter a new item.
List Box
A graphical user interface element that allows users to select one or more items from a list displayed within a box.
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