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, 4948👍, 0💬
Popular Posts:
What Is Paint Shop Pro? - PSP Tutorials - Fading Images to Background Colors with PSP Paint Shop Pro...
How To Create Nested Tables? - XHTML 1.0 Tutorials - Understanding Tables and Table Cells You can cr...
If locking is not implemented what issues can occur? IFollowing are the problems that occur if you d...
How do we generate strong names ? or What is use the of SN.EXE ? or How do we apply strong names to ...
How can a servlet refresh automatically if some new data has entered the database? You can use a cli...