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Oracle Tutorials - Run Queries on External Tables

By: FYIcenter.com

(Continued from previous topic...)

How To Run Queries on External Tables?

If you have an external table defined as a text file with the ORACLE_LOADER driver, you can add data to the text file, and query the text file through the external table. By default, data fields in the text file should be terminated by ','. The tutorial exercise below shows you how add data to the external table defined in the previous exercise:

>edit /oraclexe/test/ext_fyi_links.txt
1101,dba.fyicenter,Link #1,88,07-MAY-06
1110,dev.fyicenter,Link #2,88,07-MAY-06

>sqlplus /nolog

SQL> connect HR/fyicenter

SQL> SELECT * FROM ext_fyi_links;
       ID URL              NOTES         COUNTS CREATED
--------- ---------------- ----------- -------- ---------
     1101 dba.fyicenter    Link #1           88 07-MAY-06
     1110 dev.fyicenter    Link #2           88 07-MAY-06

(Continued on next topic...)

  1. What Is the Simplest Tool to Run Commands on Oracle Servers?
  2. What Is the Quickest Way to Export a Table to a Flat File?
  3. How To Export Data with a Field Delimiter?
  4. What Is SQL*Loader?
  5. What Is a SQL*Loader Control File?
  6. How To Load Data with SQL*Loader?
  7. What Is an External Table?
  8. How To Load Data through External Tables?
  9. What Are the Restrictions on External Table Columns?
  10. What Is a Directory Object?
  11. How To Define an External Table in a Text File?
  12. How To Run Queries on External Tables?
  13. How To Load Data from External Tables to Regular Tables?
  14. What Is the Data Pump Export Utility?
  15. What Is the Data Pump Import Utility?
  16. How To Invoke the Data Pump Export Utility?
  17. How To Invoke the Data Pump Import Utility?
  18. What Are Data Pump Export and Import Modes?
  19. How To Estimate Disk Space Needed for an Export Job?
  20. How To Do a Full Database Export?
  21. Where Is the Export Dump File Located?
  22. How To Export Your Own Schema?
  23. How To Export Several Tables Together?
  24. What Happens If the Imported Table Already Exists?
  25. How To Import One Table Back from a Dump File?
  26. What Are the Original Export and Import Utilities?
  27. How To Invoke Original Export/Import Utilities?

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