alter table test alter column aaa int--modify field type
alter table test add ccc varchar(50)--add column
alter table test drop column ccc--delete column
EXEC sp_rename "test.aaa","abc","COLUMN" -- modify the field name
alter table test alter column aaa int--modify field type
alter table test add ccc varchar(50)--add column
alter table test drop column ccc--delete column
EXEC sp_rename "test.aaa","abc","COLUMN" -- modify the field name