/* 為表新增一列*/ alter table student add classNo varchar(20) /*修改資料型別*/ alter table tableName alter column columnName varchar(4000)   /*修改列名/把表名為tableName的column1列名修改為column2*/ EXEC  sp_rename   'tableName.column1' , 'column2'   /*刪除一列*/ alter table tableName drop column columnName   

select * from Ktudent

select * from person /* 批量刪除資料*/ delete from  person where id in(5) delete from person where id >=3 and id <=10 delete from person where id between 5 and 8