Jan 15, 2013 · The SID is a site identifier. It plus the Oracle_home are hashed together in Unix to create a unique key name for attaching an SGA. If your Oracle_sid or Oracle_home is not set correctly, you'll get "oracle not available" since we cannot attach to a shared memory segment that is identified by magic key.

If you are in SQL plus and just want to know what instance or database you are connected to, you can use the following: SELECT sys_context('USERENV','INSTANCE_NAME') FROM dual; SELECT sys_context('USERENV','DB_NAME') FROM dual;

SQL*Plus is an interactive and batch query tool that is installed with every Oracle Database installation. It has a command-line user interface. There is also the SQL*Plus Instant Client which is a standalone command-line interface available on platforms that support the OCI Instant Client.

Dec 26, 2023 · SIDs are used by Oracle Net to connect to a database, while service names are used by Oracle Net to route client requests to the correct database instance. This means that you need to specify the SID when you connect to a database using Oracle Net, but you do not need to specify the service name.

Depending on your platform, you may have to set environment variables before starting SQL*Plus, or at least verify that they are set properly. For example, on most platforms, you must set the environment variables ORACLE_SID and ORACLE_HOME .

Jun 8, 2018 · Get Oracle SID: $ ps -ef | grep pmon; (or $ cat /etc/oratab - format: ORACLE_SID:ORACLE_HOME) Get Service Name: $ cat $ORACLE_HOME/network/admin/tnsnames.ora . With tnsnames.ora format, you can cat SERVICE_NAME

Oracle query command to check the SID (or instance name): Oracle query command to check database name (or server host): Att. Sergio Marcelo. Perfect. This is exactly what I wanted to know, but didn't know how to phrase. Just for completeness, you can also use ORA_DATABASE_NAME.

Aug 9, 2018 · Usually, SID = SERVICE_NAME (but doesn't have to be). If you don't have TNSNAMES.ORA, can you create one (and then use it)? Or, use this "long" form (which has SID at the end)?

SQLPlus is a powerful command-line tool bundled with Oracle Database, allowing you to execute SQL statements, PL/SQL blocks, and manage users and schema objects directly from the terminal. This manual contains steps for installation and important features and commands to begin. What is SQL Plus?

Jun 20, 2018 · Oracle SQL*Plus. What is Oracle Sql*plus: How to begin with Oracle Sql*plus; How the commands are Entered and Executed in Oracle Sql*plus; Simple Oracle SQL*Plus COMMANDS; Oracle Sql*plus download