What is a connect string in Oracle?

A connect string is a string used to identify and connect to a remote database. Connect strings are defined in a local TNSNAMES. ORA file, Oracle Names Server or OID directory. When you connect, specify the username/password@connectstring.

What is host string in SQL Plus?

A host string is the name you assign for TNS connectivity in tnsnames. ora. These entries typically identify the machine and port number and SID ( or service name) of the database you are trying to connect to. If the client and database are on same machine, you don’t need a host string.

What is connect identifier in sqlplus?

A “connect identifier” is an identification string of a single set of connection information to a specific target database instance on a specific Oracle server. Connect identifiers are defined and stored in a file called tnsnames.ora located in $ORACLE_HOME/network/admin/ directory.

How do I get SQL command-line?

To start SQL Command Line from the desktop and connect locally:

  1. Do one of the following: On Windows: Click Start, point to Programs (or All Programs), point to Oracle Database 10g Express Edition, and then select Run SQL Command Line.
  2. At the SQL Command Line prompt, enter the following command: CONNECT username/password.

What is Sid in connection string?

A sid is the Site Identifier. It, plus the oracle_home, uniquely identify a database instance on a single machine. If you are on the machine with the database, you only need the oracle_sid and oracle_home to get connected directly. A dbname is the name of the database, it typically is not relevant.

What is a connect identifier in Oracle?

A connect identifier can be the connect descriptor or a name that resolves to a connect descriptor. The connect descriptor contains: Network route to the service, including the location of the listener through a protocol address. A database service name or Oracle system identifier (SID)