1、如何更改SQL数据库名称?sp_rename 'db1','db2','database'
2、删除数据库? drop database mydb
3.
insert into T_Users values('shi','123')
UPDATE T_Users SET Password = '111' WHERE Name = 'admin'
4、删除列,增加列
alter table T_User add Name nvarchar(20)
ALTER TABLE T_User DROP COLUMN Pwd
alter table T_User add Pwd nvarchar(20)