Add Not Null Column To Existing Table Sql Server. Overview of SQL ADD COLUMN clause. If we will provide Not Null constraint for the CountryColumn and also default value.
ALTER TABLE MY_TABLE ADD STAGE INT NULL GO UPDATE MY_TABLE SET GO ALTER TABLE MY_TABLE ALTER COLUMN STAGE INT NOT NULL GO Another option is to specify correct default value for your column. NOT NULL constraint applied only at column level. Our new column has a data type of varchar 255 and it can contain null values.
Note that SQL Server doesnt support the syntax for adding a column to a table after an existing column as MySQL does.
SQL ALTER TABLE Statement. This one explains how this feature is being implemented in SQL Server 2012. The example used here may be silly. However when you add a column that doesnt allow NULLs then you have to have a value to put in it.
