473,473 Members | 2,169 Online
Bytes | Software Development & Data Engineering Community
Create Post

Home Posts Topics Members FAQ

Alter DATABASE

Hello jsut a quick question...
Is it possible to alter the DATABASE structure after it is CREATED AND
POPULATED WITH RECORDS.
For example RENAME fields, Change datatypes etc...
If not what is the best way of doing it and then restore my data?

I use MySQL - MyISAM tables
Thanks!!!
Jul 23 '05 #1
2 1950
On 03/06/2005, Angelos wrote:
Hello jsut a quick question...
Is it possible to alter the DATABASE structure after it is CREATED
AND POPULATED WITH RECORDS.
For example RENAME fields, Change datatypes etc...


http://dev.mysql.com/doc/mysql/en/data-definition.html

--
felix
Jul 23 '05 #2
Angelos wrote:
Hello jsut a quick question...
Is it possible to alter the DATABASE structure after it is CREATED AND
POPULATED WITH RECORDS.
For example RENAME fields, Change datatypes etc...


Yes, ALTER TABLE can do a lot of changes like this. Subject to
limitations that you might expect, for example what should it do with
data if you change a VARCHAR(100) to a VARCHAR(6), or for that matter to
an INTEGER?

http://dev.mysql.com/doc/mysql/en/alter-table.html

Regards,
Bill K.
Jul 23 '05 #3

This thread has been closed and replies have been disabled. Please start a new discussion.

Similar topics

2
by: Dylan Nicholson | last post by:
Seems that Oracle 9.2 (using MS ODBC driver) requires extra parentheses when adding multiple columns to a table: ALTER TABLE MyTable ADD (MyColumn1 VARCHAR(255), MyColumn2 VARCHAR(255)) vs ...
0
by: Dan Edwards | last post by:
Hi about 2 months ago I had trouble with alter table on large tables blocking all database activity and started a thread on this list called "alter table blocks other tables!" I tried to resolve...
3
by: Metal Dave | last post by:
Hello, A script we run against the database as part of the upgrade of our product is failing with the following message: ALTER TABLE ALTER COLUMN EncodedID failed because STATISTICS hind_61_3...
10
by: BuddhaBuddy | last post by:
Platform is DB2/NT 7.2.9 The table was created like this: CREATE TABLE MYTEST ( MYTESTOID bigint not null primary key, FK_OTHEROID bigint not null references other, FK_ANOTHEROID bigint not...
5
by: minjie | last post by:
Is it possible to run a simple script to alter a table column in Access database from an interger to a double? I have been writing C++ programs every time we need to upgrade (modify) the Access...
4
by: Jeff Kish | last post by:
Hi. I have a database I need to supply something (I'm assuming a t-sql script.. maybe something else is better) to update customer tables with. The operations include mostly changing varchar...
7
by: Serge Rielau | last post by:
Hi all, Following Ian's passionate postings on problems with ALTOBJ and the alter table wizard in the control center I'll try to explain how to use ALTOBJ with this thread. I'm not going to get...
9
by: Tomba | last post by:
I have a really annoying problem, which i tried solving for almost 3 days now. (I googled in any variation i could think of, but i couldn't find anything that will help my stupid me understand:\)...
1
by: Rico | last post by:
Hello, I have an SQL Server 2005 database that I'm trying to create using script. Everything works fine, but when I click on "Database Diagrams" I get an error message that there is no database...
11
by: raylopez99 | last post by:
Keep in mind this is my first compiled SQL program Stored Procedure (SP), copied from a book by Frasier Visual C++.NET in Visual Studio 2005 (Chap12). So far, so theory, except for one bug...
0
marktang
by: marktang | last post by:
ONU (Optical Network Unit) is one of the key components for providing high-speed Internet services. Its primary function is to act as an endpoint device located at the user's premises. However,...
0
by: Hystou | last post by:
Most computers default to English, but sometimes we require a different language, especially when relocating. Forgot to request a specific language before your computer shipped? No problem! You can...
0
Oralloy
by: Oralloy | last post by:
Hello folks, I am unable to find appropriate documentation on the type promotion of bit-fields when using the generalised comparison operator "<=>". The problem is that using the GNU compilers,...
1
by: Hystou | last post by:
Overview: Windows 11 and 10 have less user interface control over operating system update behaviour than previous versions of Windows. In Windows 11 and 10, there is no way to turn off the Windows...
0
tracyyun
by: tracyyun | last post by:
Dear forum friends, With the development of smart home technology, a variety of wireless communication protocols have appeared on the market, such as Zigbee, Z-Wave, Wi-Fi, Bluetooth, etc. Each...
0
by: conductexam | last post by:
I have .net C# application in which I am extracting data from word file and save it in database particularly. To store word all data as it is I am converting the whole word file firstly in HTML and...
0
by: adsilva | last post by:
A Windows Forms form does not have the event Unload, like VB6. What one acts like?
0
by: 6302768590 | last post by:
Hai team i want code for transfer the data from one system to another through IP address by using C# our system has to for every 5mins then we have to update the data what the data is updated ...
1
muto222
php
by: muto222 | last post by:
How can i add a mobile payment intergratation into php mysql website.

By using Bytes.com and it's services, you agree to our Privacy Policy and Terms of Use.

To disable or enable advertisements and analytics tracking please visit the manage ads & tracking page.