columna SQL Server Alter
ALTER TABLE table_name
ALTER COLUMN column_name new_data_type(size);
Weary Wryneck
ALTER TABLE table_name
ALTER COLUMN column_name new_data_type(size);
ALTER TABLE employees
ALTER COLUMN last_name VARCHAR(75) NOT NULL;sp_rename 'employees.last_name', 'lname', 'COLUMN';sp_rename 'table_name.old_column_name', 'new_column_name', 'COLUMN';