alter-column

I'm using SQL Server 2008 and I need to make a VARCHAR field bigger, from (200 to 1200) on a table with about 500k rows. What I need to know is if there are any issues I have not considered. I will be using this TSQL statement: ALTER TABLE MyTable ALTER COLUMN [MyColumn] VARCHAR(1200) I've already tried it on a copy of the data and this statement had no ill effects that I could see. So are there any possible problems from doing this that I may not have considered? By the way, the column is not indexed. This is a metadata change only: it is quick. An observation: specify NULL or NOT NULL

I came across an old table today with a datetime column called 'Created' which allows nulls. Now, I'd want to change this so that it is NOT NULL, and also include a constraint to add in a default value (getdate()). So far I've got the following script, which works fine provided that i've cleaned up all the nulls beforehand: ALTER TABLE dbo.MyTable ALTER COLUMN Created DATETIME NOT NULL Is there any way to also specify the default value as well on the ALTER statement? I think you will need to do this as three separate statements. I've been looking around and everything i've seen seems to

I am trying to alter column datatype of a primary key to tinyint from int.This column is a foreign key in other tables.So,I get the following error: Msg 5074, Level 16, State 1, Line 1 The object 'PK_User_tbl' is dependent on column 'appId'. Msg 5074, Level 16, State 1, Line 1 The object 'FK_Details_tbl_User_tbl' is dependent on column 'appId'. Msg 5074, Level 16, State 1, Line 1 The object 'FK_Log_tbl_User_tbl' is dependent on column 'appId'. Msg 4922, Level 16, State 9, Line 1 ALTER TABLE ALTER COLUMN appId failed because one or more objects access this column. Is there any other way other

I have a table and one of the columns is "Date" of type datetime. We decided to add a default constraint to that column Alter table TableName alter column dbo.TableName.Date default getutcdate() but this gives me error: Incorrect syntax near '.' Does anyone see anything obviously wrong here, which I am missing (other than having a better name for the column) Try this alter table TableName add constraint df_ConstraintNAme default getutcdate() for [Date] example create table bla (id int) alter table bla add constraint dt_bla default 1 for id insert bla default values select * from bla also make

I need to ALTER the data types of several columns in a table. For a single column, the following works fine: ALTER TABLE tblcommodityOHLC ALTER COLUMN CC_CommodityContractID NUMERIC(18,0) But how do I alter multiple columns in one statement? The following does not work: ALTER TABLE tblcommodityOHLC ALTER COLUMN CC_CommodityContractID NUMERIC(18,0), CM_CommodityID NUMERIC(18,0) Neil Knight This is not possible. You will need to do this one by one. You could create a Temporary Table with your modified columns in, copy the data across, drop your original table and rename your Temporary Table to

I have a table that has several nullable integer columns. This is undesirable for several reasons, so I am looking to update all nulls to 0 and then set these columns to NOT NULL . Aside from changing nulls to 0 , data must be preserved. I am looking for the specific SQL syntax to alter a column (call it ColumnA ) to " not null ". Assume the data has been updated to not contain nulls. Using SQL server 2000 . mdb First, make all current NULL values disappear: UPDATE [Table] SET [Column]=0 WHERE [Column] IS NULL Then, update the table definition to disallow NULLs: ALTER TABLE [Table] ALTER