Brand newbie question on database connection

I'm brand new to Oracle databasing and am having trouble figuring out how to set up a connection to an existing database. Specifically, I'm not clear at all about the use of the tnsname.ora file. What I'm trying to do is set up a connection using an .asp page to connect to this database. I'm using :
objConnect.Open ("Provider=MSDASQL;DRIVER={Microsoft ODBC for Oracle};Server=F12_PROD_MARS.WORLD;UID=FLGI;PWD=FLGI")
[/CODE]
Which gives me the "ORA-12154: TNS:could not resolve service name" error. I know the information that I need in my tnsname.ora file is:F12_PROD_MARS =
(DESCRIPTION=
(ADDRESS_LIST=
(ADDRESS=
(PROTOCOL=TCP)
(Host=172.31.xx.xx)
(Port=1521)
(ADDRESS=
(PROTOCOL=TCP)
(Host=172.31.xx.xx)
(Port=1526)
(CONNECT_DATA=
(SID=MARS)
I don't know where the tnsname.ora file is supposed to be located or how to reference it from .asp or anything like that though. The only database connection experience I have is with my own access databases, but none trying to connect to someone elses oracle db. Any help at all or a link to some kind of starters guide would be much appreciated. Also, I downloaded pl/sql developer, but I cannot log on to that either. I don't know if its the same connection issue here, but I know my user/pass for the server is correct, what do I enter for database, so that the application knows where to go? Thanks again... -ST

objConnect.Open ("Provider=MSDASQL;DRIVER={Microsoft
t ODBC for
Oracle};Server=F12_PROD_MARS.WORLD;UID=FLGI;PWD=FLGI")I take it you have the Oracle Client installed on the web app server i.e. where the MS ODBC driver lives
ODBC now looks for tns name "f12_prod_mars.world" ...
Which gives me the "ORA-12154: TNS:could not resolve service name" error.
I know the information that I need in my tnsname.ora file is:
F12_PROD_MARS =
... because it looks for that name, including .world, and cant find it. Name "f12_prod_mars" is not the same name, obviously. (like test.com and test.se are different)
I don't know where the tnsname.ora file is supposed
to be located or how to reference it from .asp orWhere is it located now? If you search the harddrives for tnsnames.ora, what do you get?
connection issue here, but I know my user/pass for
the server is correct, what do I enter for database,
so that the application knows where to go? ThanksIf an app, like sql*plus, is asking for "Database:" it often means you give the tns name (=the alias for the tns connect descriptor, which is the thing with lots of ('s and )'s) :)
Message was edited by:
orafad

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Message was edited by:
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