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Oracle Tutorials - What Is a Connect Identifier

By: FYIcenter.com

(Continued from previous topic...)

What Is a Connect Identifier?

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. Here is one example of a "connect identifier" definition:

FYI_XE =
  (DESCRIPTION =
    (ADDRESS = 
      (PROTOCOL = TCP)
      (HOST = dba.fyicenter.com)
      (PORT = 1521)
    )
    (CONNECT_DATA =
      (SERVER = DEDICATED)
      (SERVICE_NAME = XE)
    )
  )

The above "connect identifier" defines "TNS_XE" with the following connection information:

  • The network hostname: dba.fyicenter.com.
  • The network port number: 1521.
  • The name of the target database instance: XE.

(Continued on next topic...)

  1. What Is SQL*Plus?
  2. How To Start the Command-Line SQL*Plus?
  3. How To Get Help at the SQL Prompt?
  4. What Information Is Needed to Connect SQL*Plus an Oracle Server?
  5. What Is a Connect Identifier?
  6. How To Connect a SQL*Plus Session to an Oracle Server?
  7. What Happens If You Use a Wrong Connect Identifier?
  8. What To Do If DBA Lost the SYSTEM Password?
  9. What Types of Commands Can Be Executed in SQL*Plus?
  10. How To Run SQL Commands in SQL*Plus?
  11. How To Run PL/SQL Statements in SQL*Plus?
  12. How To Change SQL*Plus System Settings?
  13. How To Look at the Current SQL*Plus System Settings?
  14. What Are SQL*Plus Environment Variables?
  15. How To Generate Query Output in HTML Format?
  16. What Is Output Spooling in SQL*Plus?
  17. How To Save Query Output to a Local File?
  18. What Is Input Buffer in SQL*Plus?
  19. How To Revise and Re-Run the Last SQL Command?
  20. How Run SQL*Plus Commands That Are Stored in a Local File?
  21. How To Use SQL*Plus Built-in Timers?
  22. What Is Oracle Server Autotrace?
  23. How To Set Up Autotrace for a User Account?
  24. How To Get Execution Path Reports on Query Statements?
  25. How To Get Execution Statistics Reports on Query Statements?

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