ALTER TABLE.....Multiple operations in 1 statement

[CID8]

Does anyone know whether I need to do 3 separate statements to achieve the following, a single statement doesn't seem to work?

ALTER TABLE AdmixCorr
ALTER COLUMN AdmixCorrID INT NOT NULL,
ALTER COLUMN AdmixCorrRef VARCHAR(20) NOT NULL,
ADD COLUMN DateImp DATETIME NOT NULL

Thanks in advance

 

[DanChard]

As far as I know (which isn't far), you can only make one alteration per query.