alter-column

问题 So I want to change a column in my SQL Server database to not allow nulls, but I keep getting an error. this is the sql statement I am using: alter table [dbo].[mydatabase] alter column WeekInt int not null and this is the error I am getting : Msg 515, Level 16, State 2, Line 1 Cannot insert the value NULL into column 'WeekInt', table 'CustomerRadar.dbo.tblRWCampaignMessages'; column does not allow nulls. UPDATE fails. The statement has been terminated. I'm pretty sure my sql is right, and

问题 So I want to change a column in my SQL Server database to not allow nulls, but I keep getting an error. this is the sql statement I am using: alter table [dbo].[mydatabase] alter column WeekInt int not null and this is the error I am getting : Msg 515, Level 16, State 2, Line 1 Cannot insert the value NULL into column 'WeekInt', table 'CustomerRadar.dbo.tblRWCampaignMessages'; column does not allow nulls. UPDATE fails. The statement has been terminated. I'm pretty sure my sql is right, and

问题 So I want to change a column in my SQL Server database to not allow nulls, but I keep getting an error. this is the sql statement I am using: alter table [dbo].[mydatabase] alter column WeekInt int not null and this is the error I am getting : Msg 515, Level 16, State 2, Line 1 Cannot insert the value NULL into column 'WeekInt', table 'CustomerRadar.dbo.tblRWCampaignMessages'; column does not allow nulls. UPDATE fails. The statement has been terminated. I'm pretty sure my sql is right, and

问题 So I want to change a column in my SQL Server database to not allow nulls, but I keep getting an error. this is the sql statement I am using: alter table [dbo].[mydatabase] alter column WeekInt int not null and this is the error I am getting : Msg 515, Level 16, State 2, Line 1 Cannot insert the value NULL into column 'WeekInt', table 'CustomerRadar.dbo.tblRWCampaignMessages'; column does not allow nulls. UPDATE fails. The statement has been terminated. I'm pretty sure my sql is right, and

问题 I use MS Access (2003) database. Once I create a column I set NOT NULL using sql statement: ALTER TABLE Table1 ALTER column myColumn INTEGER not null Is there a way to change it back to allow null values? I already tried: ALTER TABLE Table1 ALTER column myColumn INTEGER null but nothing... 回答1: You cant specify null in ALTER TABLE (although not null is allowed) See the below documentation and also this discussion on this toppic Syntax ALTER TABLE table {ADD {COLUMN field type[(size)] [NOT

问题 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

问题 Possible Duplicate: DEFAULT clause in ALTER TABLE statement resulting in syntax error I am trying to execute the following statement using a SQL query within MS Access; ALTER TABLE [table] ALTER COLUMN [column] SET DEFAULT 'default value' However, I get a dialog displaying the error Syntax error in ALTER TABLE statement. And when I click OK it highlights the word DEFAULT . I also tried the following statement; ALTER TABLE [table] ADD CONSTRAINT [Default] DEFAULT 'default value' FOR [column]

问题 Possible Duplicate: DEFAULT clause in ALTER TABLE statement resulting in syntax error I am trying to execute the following statement using a SQL query within MS Access; ALTER TABLE [table] ALTER COLUMN [column] SET DEFAULT 'default value' However, I get a dialog displaying the error Syntax error in ALTER TABLE statement. And when I click OK it highlights the word DEFAULT . I also tried the following statement; ALTER TABLE [table] ADD CONSTRAINT [Default] DEFAULT 'default value' FOR [column]

问题 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

问题 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? 回答1: I think you will