Solved

ALTER Table command to change datatype and default value

Posted on 2010-09-20
2
586 Views
Last Modified: 2012-08-13
Hi all -
I have a table X with a column Y of datatype varchar and a default value of '1'.
The column contains existing numerical data but of type varchar.
How do I alter the column to change datatype to INT and update the default value to 1 (instead of '1')  ?
How do I change the existing data in the column to INT ?
0
Comment
Question by:deirekn
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
2 Comments
 
LVL 58

Accepted Solution

by:
cyberkiwi earned 500 total points
ID: 33715271
declare @sql nvarchar(max)
select @sql='alter table X drop constraint ' + object_name(constid) from sysconstraints where id=object_id('X')
exec (@sql);
alter table X alter column Y int;
alter table X add constraint df_X_Y default(1) for Y;
0
 

Author Closing Comment

by:deirekn
ID: 33727246
Thank you. That worked great.
0

Featured Post

Use Case: Protecting a Hybrid Cloud Infrastructure

Microsoft Azure is rapidly becoming the norm in dynamic IT environments. This document describes the challenges that organizations face when protecting data in a hybrid cloud IT environment and presents a use case to demonstrate how Acronis Backup protects all data.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

In this article I will describe the Backup & Restore method as one possible migration process and I will add the extra tasks needed for an upgrade when and where is applied so it will cover all.
In this article I will describe the Copy Database Wizard method as one possible migration process and I will add the extra tasks needed for an upgrade when and where is applied so it will cover all.
Add bar graphs to Access queries using Unicode block characters. Graphs appear on every record in the color you want. Give life to numbers. Hopes this gives you ideas on visualizing your data in new ways ~ Create a calculated field in a query: …
In this video, Percona Director of Solution Engineering Jon Tobin discusses the function and features of Percona Server for MongoDB. How Percona can help Percona can help you determine if Percona Server for MongoDB is the right solution for …

621 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question