Solved

How to add a variable to a drop statement

Posted on 2013-06-24
1
443 Views
Last Modified: 2013-06-24
Hi there

I need to get a constraint name, this is what I'm using:

DECLARE @constraint as varchar(100)
set @constraint =
(select dobj.name
from sys.columns col
left outer join sys.objects dobj
on dobj.object_id = col.default_object_id and dobj.type = 'D'
where col.object_id = object_id(N'dbo.SongShare')
and dobj.name is not null)

and then I want to run this

ALTER TABLE MSO_SongShare DROP CONSTRAINT + ' ' + @constraint
alter table MSO_SongShare drop column share
EXEC sp_rename 'MSO_SongShare.share_New', 'share', 'COLUMN'
ALTER TABLE MSO_SongShare ADD  DEFAULT ((0)) FOR share

as you can see on this line

ALTER TABLE MSO_SongShare DROP CONSTRAINT + ' ' + @constraint

it does not work, how do i get the constraint name and drop it?

thanks
0
Comment
Question by:mousemat24
1 Comment
 
LVL 16

Accepted Solution

by:
Surendra Nath earned 500 total points
ID: 39271048
you have  tse dynamic sql

declare @sql varchar(500)
set @sql = 'ALTER TABLE MSO_SongShare DROP CONSTRAINT ' + ' ' + @constraint
exec(@SQL)

Open in new window

0

Featured Post

Free Tool: Path Explorer

An intuitive utility to help find the CSS path to UI elements on a webpage. These paths are used frequently in a variety of front-end development and QA automation tasks.

One of a set of tools we're offering as a way of saying thank you for being a part of the community.

Question has a verified solution.

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

Ever needed a SQL 2008 Database replicated/mirrored/log shipped on another server but you can't take the downtime inflicted by initial snapshot or disconnect while T-logs are restored or mirror applied? You can use SQL Server Initialize from Backup…
In this article we will learn how to fix  “Cannot install SQL Server 2014 Service Pack 2: Unable to install windows installer msi file” error ?
This videos aims to give the viewer a basic demonstration of how a user can query current session information by using the SYS_CONTEXT function
Viewers will learn how to use the SELECT statement in SQL and will be exposed to the many uses the SELECT statement has.

860 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