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MySQL Tutorial - Delete an Existing Column in a Table

By: FYIcenter.com

(Continued from previous topic...)

How To Delete an Existing Column in a Table?

If you have an existing column in a table and you do not need that column any more, you can delete it with "ALTER TABLE ... DROP COLUMN" statement. Here is a tutorial script to delete an existing column:

mysql> ALTER TABLE tip DROP COLUMN create_date;
Query OK, 1 row affected (0.48 sec)
Records: 1  Duplicates: 0  Warnings: 0

mysql> SELECT * FROM tip;
+----+-------------+-------------------------+--------+
| id | subject     | description             | author |
+----+-------------+-------------------------+--------+
|  1 | Learn MySQL | Visit dev.fyicenter.com | NULL   |
+----+-------------+-------------------------+--------+
1 row in set (0.00 sec)

As you can see the column "create_date" is gone.

(Continued on next topic...)

  1. What Are DDL Statements?
  2. How To Create a New Table?
  3. What Happens If You No CREATE Privilege in a Database?
  4. How To Get a List of All Tables in a Database?
  5. How To Get a List of Columns in an Existing Table?
  6. How To See the CREATE TABLE Statement of an Existing Table?
  7. How To Create a New Table by Selecting Rows from Another Table?
  8. How To Add a New Column to an Existing Table?
  9. How To Delete an Existing Column in a Table?
  10. How To Rename an Existing Column in a Table?
  11. How To Rename an Existing Table?
  12. How To Drop an Existing Table?
  13. How To Create an Index for a Given Table?
  14. How To Get a List of Indexes of a Given Table?
  15. How To Drop an Existing Index?
  16. How To Create a New View?
  17. How To Drop an Existing View?

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