Connecting to your Oracle Database
There are a number of ways to log into your newly
created Oracle database. Programmers will use things like ODBC, JDBC and OCI to
connect to your database from their application. You, the DBA, have a number of
tools available to you that allow you to connect to and manage your database
including SQL*Plus and Oracle Enterprise Manager (OEM). Also a number of third
party tools are available for you to use that can help you manage your Oracle
Connecting to the Database with the SQL*Plus Client
In this section, we are interested in the principle DBA
interface into Oracle, SQL*Plus. There are two versions of SQL*Plus readily
available. The first is the SQL*Plus client version which can be installed on
any Windows based PC.
To start the SQL*Plus client from Windows click on
start->Your_oracle_home_location->application development-> SQL Plus. When you
do, you will see the SQL*Plus login screen as seen here:
We just created our database in DBCA, and assigned a
password to the DBA management account SYS. Now we want to log in as SYS. To do
so, we enter the connection below:
In this case, we are connecting to the SYS account of
the database we just created. The SYS account is an all powerful account in
Oracle, and it should never be used lightly.
Notice the host string setting. Here we put in our
database name (booktest), and we added the syntax as sysdba. Most non-DBA’s will
never use the as sysdba command, for it implies special privileges are granted
to the person logging in. In your case, you are a DBA, so you need the special
privileges that as sysdba provides.
At this point, you will be logged into Oracle, and
SQL*Plus will be ready to accept your commands. FYI, there is another version
of SQL*Plus out there, called iSQL*Plus, with an Internet interface.
This screen print shows you what the SQL*Plus client
looks like once it comes up:
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