Sqlserver事务备份和还原的实例代码(必看)

create database mydb
use mydb
go
create table account(
  id varchar(16),
  name varchar(16),
  balance float
)
go
select * from account
insert into account(id, name, balance) values('620101', 'liyong', 300)
insert into account(id, name, balance) values('620106', 'mali', 400)
--insert into account(id, name, balance) values('620009', 'chenying', 800)
insert into account(id, name, balance) values('646009', 'chenying', 800)
--delete from account where id = '620009'
go
update account set balance = balance - 1000 where id = '620101'
update account set balance = balance + 1000 where id = '620106'
--消息 547，级别 16，状态 0，第 1 行
--UPDATE 语句与 CHECK 约束"CK_Blance"冲突。该冲突发生于数据库"mydb"，表"dbo.accou