- #Command to get back sql prompt in sqlplus software#
- #Command to get back sql prompt in sqlplus password#
This is useful when automating Oracle tasks like via the Oracle crontab, etc. To suppress banner information such as version, Oracle copyright, SQL prompt, etc use the –S option of Sqlplus: To disconnect from an Oracle database but not exit Sqlplus: SQL> disconnect If you want to keep this file in a separate location then you can define the variable SQLPATH and put that file in that location. Any SQL or Sqlplus statement you put in this file will automatically be executed upon launching Sqlplus, whether you connect to a database or not. There is another file you can create locally in the same directory where you launch Sqlplus and it is called login.sql. If you want to keep this file in a separate location then you can define the variable TNS_ADMIN and put that file in that location. TNS stands for Transparent Network Substrate and it runs on top of the industry standard TCP/IP protocol. In this file you can set many parameters to control the behavior of TNS, the network protocol for interacting with an Oracle database. There is a file you can create locally in the same directory where you launch Sqlplus and it is called sqlnet.ora. Note on UNIX or Linux systems the variable would be TWO_TASK. If you wanted to set the database name before you connect. SQL> connect with the method above you can also jump from one database to another without exiting Sqlplus and then launching it again. To launch Sqlplus without being prompted for a username or password: $ sqlplus /nolog
#Command to get back sql prompt in sqlplus password#
The remedy is to embed the password in an UNIX environmental variable or to connect to sqlplus with the /nolog option and the subsequently connect to the database instance via the CONNECT statement. Keep in mind that in earlier Oracle releases the password was visible via ps –ef for the entire duration of the sqlplus session. There appears to be a short period of time after the invocation of Sqlplus where it is still visible. Even though it appears that Oracle ultimately removes the password from the ps –ef output, it doesn’t appear to do it right away. This apparently is the fix that has been implemented in recent releases of Oracle. Note how when I first execute Sqlplus I see the password via ps –ef however when I run ps –ef again, the password goes away and just shows sqlplus. What is going on here is when you first connect to Sqlplus in UNIX and use the syntax above, for a short time the database user’s password would be visible via ps –ef output. This is undesirable because it can display the password in clear text via ps –ef command output on UNIX or Linux systems: $ sqlplus you were to invoke Sqlplus via the command above on a UNIX system and then were to open another window to the same UNIX system and execute the ps –ef command you would see the following: ps –ef while loop: This is the way to connect to Oracle in an unattended batch way, like via scripts.
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The less desirable way to connect to an Oracle instance is to use the batch way. To connect to an Oracle database instance and be prompted for both your username and password: #$ sqlplus To connect to an Oracle database instance and be prompted for your password: $ sqlplus password: PASSWORD The $TNS_ADMIN variable is $ORACLE_HOME/network/admin. Note, the DB_NAME you are using in these examples is an alias which is resolved to a database service name which is listed in the file $TNS_ADMIN/tnsnames.ora. Please refer to the Oracle documentation for that. This is not intended to be a comprehensive reference.
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I wrote this blog entry to demonstrate some useful features I have found throughout my experience as a DBA.
#Command to get back sql prompt in sqlplus software#
It is installed in $ORACLE_HOME/bin, where ORACLE_HOME is the location where the Oracle software is installed, i.e. The Sqlplus utility is installed with the Oracle client software or Oracle server software. Sqlplus is the Oracle equivalent of the db2 CLI interface for IBM DB2, the mysql CLI interface for MySQL and others. Even with the advent of GUI alternatives such as SQLDeveloper, TOAD, etc Sqlplus still is the preferred method to connect to an Oracle database by many professionals. Once connected to a database via Sqplus, you can then execute Sqlplus specific and SQL statements, e.g. It is one of the oldest Oracle tools and one of the most famous. It is used by DBAs to administer a database, by developers to develop server side software components, and others. Sqlplus is the command line interface client for the Oracle database.