SqlServer的 timestamp数据类型

-- 时间戳类型和bigint互相转化示例：by jinjazz

set  nocount  on

-- 申明3个时间戳

declare   @timeFlag1   bigint

declare   @timeFlag2   bigint

declare   @timeFlag3   bigint

-- 建立表，timestamp类型不需要字段名

create   table  test( timestamp ,a  int )

-- 插入1 记录时间戳，@@dbts为数据库时间戳

insert   into  test  select   null , 1

set   @timeFlag1 = cast ( @@dbts   as   bigint )

-- 插入2 记录时间戳

insert   into  test  select   null , 2

set   @timeFlag2 = cast ( @@dbts   as   bigint )

-- 更新3 记录时间戳

update  test  set  a = 3   where  a = 2

set   @timeFlag3 = cast ( @@dbts   as   bigint )

-- 时间戳1的记录

select   * from  test  where   timestamp = cast ( @timeFlag1   as   varbinary ( 8 ))

-- 时间戳2的记录已经不存在了

select   * from  test  where   timestamp = cast ( @timeFlag2   as   varbinary ( 8 ))

-- 时间戳3的记录

select   * from  test  where   timestamp = cast ( @timeFlag3   as   varbinary ( 8 ))

-- 删除表

drop   table  test

set  nocount  off

/**/ /*--测试结果

timestamp          a

------------------ -----------

0x000000000000B553 1

timestamp          a

------------------ -----------

timestamp          a

------------------ -----------

0x000000000000B555 3

*/