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, 5004👍, 0💬
Popular Posts:
How Many Tags Are Defined in HTML 4.01? There are 77 tags defined in HTML 4.01: a abbr acronym addre...
Which bit wise operator is suitable for checking whether a particular bit is on or off? The bitwise ...
Explain all parts of a deployment diagram? Package: It logically groups element of a UML model. Node...
Why is there extra white space before or after tables? This is often caused by invalid HTML syntax. ...
How Are Vertical Margins between Two Block Elements Collapsed? - CSS Tutorials - Understanding Multi...