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MySQL Tutorial - Adding More Data to the Test Table

By: FYIcenter.com

(Continued from previous topic...)

How To Add More Data to the Testing Table?

If you want to continue with other tutorial exercises in this FAQ collection, you need to add more data to the testing table. Follow the script below to add a new column and :

mysql> ALTER TABLE fyi_links ADD COLUMN tag VARCHAR(8);
mysql> UPDATE fyi_links SET tag = 'DEV' WHERE id = 101;
mysql> UPDATE fyi_links SET tag = 'DBA' WHERE id = 102;
mysql> UPDATE fyi_links SET tag = 'SQA' WHERE id = 103;

mysql> INSERT INTO fyi_links VALUES (104, 
   'www.mysql.com', '', '0', '2006-01-01', 'DBA');
mysql> INSERT INTO fyi_links VALUES (105,
   'www.oracle.com', '', '0', '2005-01-01', 'DBA');
mysql> INSERT INTO fyi_links VALUES (106,
   'www.php.net', '', '0', '2004-01-01', 'DEV');
mysql> INSERT INTO fyi_links VALUES (107, 
   'www.winrunner.com', '', '0', '2003-01-01', 'SQA');

mysql> UPDATE fyi_links SET counts = FLOOR(RAND()*10);

mysql> SELECT id, url, counts, DATE(created), tag 
   FROM fyi_links;
+-----+-------------------+--------+---------------+------+
| id  | url               | counts | DATE(created) | tag  |
+-----+-------------------+--------+---------------+------+
| 101 | dev.fyicenter.com |      4 | 2006-04-30    | DEV  |
| 102 | dba.fyicenter.com |      3 | 2006-07-01    | DBA  |
| 103 | sqa.fyicenter.com |      6 | 2006-07-01    | SQA  |
| 104 | www.mysql.com     |      1 | 2006-01-01    | DBA  |
| 105 | www.oracle.com    |      7 | 2005-01-01    | DBA  |
| 106 | www.php.net       |      4 | 2004-01-01    | DEV  |
| 107 | www.winrunner.com |      8 | 2003-01-01    | SQA  |
+-----+-------------------+--------+---------------+------+
7 rows in set (0.00 sec)

(Continued on next topic...)

  1. What Is a SELECT Query Statement?
  2. How To Create a Testing Table with Test Data?
  3. How To Select All Columns of All Rows from a Table?
  4. How To Select Some Columns from a Table?
  5. How To Select Some Rows from a Table?
  6. How To Add More Data to the Testing Table?
  7. How To Sort the Query Output?
  8. Can the Query Output Be Sorted by Multiple Columns?
  9. How To Sort Output in Descending Order?
  10. How To Use SELECT Statement to Count Number of Rows?
  11. Can SELECT Statements Be Used on Views?
  12. How To Filter Out Duplications in Returning Rows?
  13. What Are Group Functions?
  14. How To Use Group Functions in the SELECT Clause?
  15. Can Group Functions Be Mixed with Non-group Selection Fields?
  16. How To Divide Query Output into Groups?
  17. How To Apply Filtering Criteria at Group Level?
  18. How To Count Duplicated Values in a Column?
  19. Can Multiple Columns Be Used in GROUP BY?
  20. Can Group Functions Be Used in the ORDER BY Clause?

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