Dear All, http://forums.oracle.com/forums/forum.jspa?forumID=61 1. Where we can use X_$ or V_$. 2. Is X_$ and V_$ contains the same data/info. If the info is not same, then at which the info is presented. 3. Is both X_$ and V_$ are views Please let me know your concerns. Thanks, Amit Verma Oracle DBA & System Adminstrator E-Mail:- in.amitverma@xxxxxxxxx, v.amit@xxxxxxxxxxx WebSite:- http://www.linkedin.com/in/vamit IM:- verma.labs@xxxxxxxxx Mobile:- (+91) 98910.98927