Categories:
.NET (357)
C (330)
C++ (183)
CSS (84)
DBA (2)
General (7)
HTML (4)
Java (574)
JavaScript (106)
JSP (66)
Oracle (114)
Perl (46)
Perl (1)
PHP (1)
PL/SQL (1)
RSS (51)
Software QA (13)
SQL Server (1)
Windows (1)
XHTML (173)
Other Resources:
How To Delete an Existing Column in a Table
How To Delete an Existing Column in a Table? - MySQL FAQs - Understanding SQL CREATE, ALTER and DROP Statements
✍: FYIcenter.com
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.
2007-05-11, 5073👍, 0💬
Popular Posts:
How To Write a Query with a Right Outer Join? - Oracle DBA FAQ - Understanding SQL SELECT Query Stat...
How To Enter Numeric Values as HEX Numbers? - MySQL FAQs - Introduction to SQL Basics If you want to...
How To Get the Uploaded File Information in the Receiving PHP Script? Once the Web server received t...
Which bit wise operator is suitable for checking whether a particular bit is on or off? The bitwise ...
What Information Is Needed to Connect SQL*Plus an Oracle Server? - Oracle DBA FAQ - Introduction to ...