Please start any new threads on our new site at https://forums.sqlteam.com. We've got lots of great SQL Server experts to answer whatever question you can come up with.

 All Forums
 General SQL Server Forums
 New to SQL Server Programming
 Changing Char/NChar column from NOTNULL to NULL

Author  Topic 

senthilaa
Starting Member

12 Posts

Posted - 2008-04-19 : 17:30:19
Hi I have a table, which contains Char and NChar NOT NULL columns
Now I need to change it to NULL, when I use the following command, it fails for the following error,

The command I used,
ALTER TABLE <TableName>
ALTER COLUMN <ColName> CHAR NULL
ALTER TABLE <TableName>
ALTER COLUMN <ColName> NCHAR NULL


Msg 8152, Level 16, State 13, Line 1
String or binary data would be truncated.
The statement has been terminated.

But for the same table, the below command executes fine,
ALTER TABLE <TableName>
ALTER COLUMN <ColName> SMALLINT NULL


Also I can change the NULLABILITY from NOTNULL to NULL using Enterprise Manger, editing the table using Table Design and selecting Allow Nulls option.

I need a script to accomplish this task.

Any help would be greatly appreciated.


-Senthil

nr
SQLTeam MVY

12543 Posts

Posted - 2008-04-19 : 17:38:32
you need char(n) null
where n is the length of the column.
The error is because it is taking the default length which is smaller than the current size.

==========================================
Cursors are useful if you don't know sql.
DTS can be used in a similar way.
Beer is not cold and it isn't fizzy.
Go to Top of Page
   

- Advertisement -