cannot be modified to null sql

ORA-01451: column to be modified to NULL cannot be modified to NULL: Hi, I have a column in one of my tables which was specified to be not null earlier When I execute the following SQL Script to modify this to null,i get the following error ORA-01451. If the modified column is an identity column, For more information, see COLLATE (Transact-SQL) NULL A PRIMARY KEY constraint cannot be dropped if an XML index exists on the table A column cannot be dropped when it is. Cannot change column to Not Null: Cannot insert the value NULL into column ' ', table '.dbo.Tmp_ '; - Unable to modify table Cannot insert the value NULL into column ' <columnname> ', table ' <dbname> dbo.Tmp_ <tablename> '; column does not allow nulls INSERT fails The (import to sql after expanding databases, Value cannot be null Parameter name: viewInfo (Microsoft.SqlServer.Management.SqlStudio.Explorer After installing IBM iAccess I receive the same error Repairing SQL Server installation and even reinstalling it does not help. Description: EJB/CMP application works with MySQL 4.0, but can't update/insert records in MySQL 4.1 because TIMESTAMP columns can't be set to NULL com.caucho.ejb.CreateExceptionWrapper: java.sql.SQLException: Column 'last_modified' cannot be otherwise I would not be getting an. IdeaBlade.Util.IdeaBladeException was unhandled by user code Message=Null entity cannot be modified Source=IdeaBlade.Persistence StackTrace.SQLCE Insert sql error The column cannot be modified {The column cannot be modified The column cannot contain null values SqlCE exception 1 The column cannot be modified [ Column name = UserId ] . ORA-01451: column to be modified to NULL cannot be modified to NULL Cause: the column may already allow NULL values, the NOT NULL constraint is part of a primary key or check constraint. ORA-01451 column to be modified to NULL cannot be modified to NULL SQL*Loader-00653 XML data set to NULL in column string, row number, table string WM_ERROR_95 null savepoint name passed in as inpu.SSMS 2012 Can't modify 2008r2 maintenance plan: Value cannot be null component system.design I get this error using SSMS2012 on my local PC when trying to Modify a Backup Maintenance Plan on a SQL 2008 R2 SP1 server.Version 10.50.2500 (X64) to be precise. ORA-01451: column to be modified to NULL cannot be modified to NULL: Cause: the column may already allow NULL values, the NOT NULL constraint is part of a primary key or check constraint Action. The column cannot be modified P3: Column name: SSCE_M_COLUMNNOTUPDATEABLE: 25005 : The column cannot contain null values Not applicable: SSCE_M_NULLINVALID: SQL statement: SSCE_M_QP_MULTI_IDENTITY_COLUMNS: 25551 : The identity column must be an integer data type and cannot be NULL.