How to change the Default value of a Column

What's the SQL or is there a stored procedure
to replace the DEFAULT value of a COLUMN?
Dropping and re-adding the column seems overkill to me.
thanks in advance
You do an alter table to drop the constraint and then alter table to add it
back. You don't drop/add the column.
Tom
Thomas A. Moreau, BSc, PhD, MCSE, MCDBA
SQL Server MVP
Columnist, SQL Server Professional
Toronto, ON Canada
www.pinnaclepublishing.com
..
"Baranggay Ginebra" <d@.d.com> wrote in message
news:3aed85F6bv1ejU1@.individual.net...
What's the SQL or is there a stored procedure
to replace the DEFAULT value of a COLUMN?
Dropping and re-adding the column seems overkill to me.
thanks in advance
|||ALTER TABLE <table_name> DROP CONSTRAINT <constraint name>
ALTER TABLE <table_name> ADD CONSTRAINT <constraint name> DEFAULT
<expression> FOR <column name>
If you have auto named default names, you can use the following script,
substituting <table name> and <column name>:
DECLARE @.constraint_name SYSNAME
-- remove all the defaults
WHILE 1=1
BEGIN
SET @.constraint_name = (SELECT TOP 1 c_obj.name
FROM sysobjects t_obj
INNER JOIN sysobjects c_obj
ON t_obj.id = c_obj.parent_obj
INNER JOIN syscolumns cols
ON cols.colid = c_obj.info
AND cols.id = c_obj.parent_obj
WHERE t_obj.id = OBJECT_ID('<table name>')
AND c_obj.xtype = 'D'
AND cols.[name]IN ('<column names>'))
IF @.constraint_name IS NULL BREAK
EXEC ('ALTER TABLE <table name> DROP CONSTRAINT ' + @.constraint_name)
END
Jacco Schalkwijk
SQL Server MVP
"Baranggay Ginebra" <d@.d.com> wrote in message
news:3aed85F6bv1ejU1@.individual.net...
> What's the SQL or is there a stored procedure
> to replace the DEFAULT value of a COLUMN?
> Dropping and re-adding the column seems overkill to me.
>
> thanks in advance
>
|||excellent !
thank a lot : )