How to check whether User is alreadylogged in or not

Hi..I want to check whether Particular User is already logged in or not ?? I had userid,password and status in my database.
If anybody shows me how to implement it ??
Reggards
Chintan

If you want to prevent multiple logins happening, use a profile on the database server that limits a login to a set number of simultaneous connections.
If you just ant to check which users are logged in, the v$session table will have that information.
Justin
Distributed Database Consulting, Inc.
http://www.ddbcinc.com/askDDBC

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How to check whether User is alreadylogged in or not

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