How would anybody here know what usernames and passwords and SID's you have set up on your database?
Ask your DBA for the information.
If you installed the database yourself then you will have supplied the password etc. yourself as part of the installation.
Please let me know how can i connect data bas using sql developer what id and pass i shuold use and SID..plz share the first tiem connetion doc.
First - do you HAVE a database to connect to? Sql developer does NOT include a database.
You need to have a database installed either on your client machine with sql developer or on another machine that you have a network connection to.
Post the full version of sql developer that you are using and info about the location, name and version of the database you want to connect to