Installation of 10g (10.2) problem

Question

Hi,
I want SQL * PLUS,FORMS,REPORTS (all in one).
So i download 10g release 2. i try to download that on windows but it shows requerments failled like that.why it shows like that? what i do know?
i try to installa that on my friend system it will installed but data base not connected, well opening SQL *PLUS it shows ORA-12560: TNS:protocol adapter error
in ORACLE threads i got below information
C:\Document and settings\ORANGE> cd\
C:\> set oracle_sid=<DB name>
e.g C:\> set oracle_sid=<rajesh> {press enter}
C:\> sqlplus /nolog {press enter}
sql:\>connect sys/sys as sysdba {press enter} it cant ask for password directly connected
or
sql:\>connect sys as sysdba {press enter}
password : sys {press enter}
sql:\> connected
or
sql:\> connect scott {press enter}
Enter password :tiger {press enter}
sql:\> connected
or
sql:\> connect system {press enter}
Enter password :manager {press enter}
sql:\> connected
but it didtn work plz help me to slove this
plz

Answer 1

You stated you have downloaded 10gR2, but it is not clear if you refer to the 10gR2 database, 10gR2 Application Server or 10gR2 Developer Suite. The only one which has the forms and reports builder is the Developer Suite, which you can download from the OTN download area.
In a local connection in th windows environment, the error "TNS:protocol adapter error" means you are trying to connect to a non started oracle database service. You must verify the database you are trying to connect is started and your environment variable ORACLE_SID properly identifies it. Otherwise, make sure both, the database and listener are started and you can connect by means of the TNSEntry (assuming it is properly configured too).
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