SQL Server 2008：データ型の一括変更

これをManagementStudioで実行し、結果をコピーして新しいクエリウィンドウに貼り付けます。

select 'ALTER TABLE ' + OBJECT_NAME(o.object_id) + 
    ' ALTER COLUMN ' + c.name + ' DATETIME2 ' +
    CASE WHEN c.is_nullable = 0 THEN 'NOT NULL' ELSE 'NULL' END 
from sys.objects o
inner join sys.columns c on o.object_id = c.object_id
inner join sys.types t on c.system_type_id = t.system_type_id
where o.type='U'
and c.name = 'Timestamp'
and t.name = 'datetime'
order by OBJECT_NAME(o.object_id)