說到同步,其實是靠"作業"定時調度存儲過程來操作數據,增,刪,改,全在里面,結合觸發器,游標來實現,關于作業調度,我使用了5秒運行一次來實行"秒級作業",這樣基本就算比較快的"同步"

我做的是SQL Server往Oracle端同步,先在sql server上建立往Oracle端的鏈接服務器,我用一個視圖"封裝"了一下鏈接服務器下的一張表。

create view v_ora_PUBLISHLASTREC

as

select * from ORACLEDB..ROADSMS.PUBLISHLASTREC

//ORACLEDB鏈接服務器名,ROADSMS為表空間名,PUBLISHLASTREC 為數據表名

然后我們分別在sql server 要同步的表上建立,insert,delete,update觸發器

腳本如下:

--說明:modiid等于1為insert,2為delete,3為update

create trigger trg_PUBLISHLASTREC_insert on PUBLISHLASTREC for insert

as

insert into dbo.PublishLastRec_SQL(modiid,SignalGUID,AreaNo,SignalNote,AreaNote,PublishRoadStatus,PublishTime,IsExec)

select '1',SignalGUID,AreaNo,SignalNote,AreaNote,PublishRoadStatus,PublishTime,'0' from inserted

create trigger trg_PUBLISHLASTREC_update on PUBLISHLASTREC for update

as

insert into dbo.PublishLastRec_SQL(modiid,SignalGUID,AreaNo,SignalNote,AreaNote,PublishRoadStatus,PublishTime,IsExec)

select '3',SignalGUID,AreaNo,SignalNote,AreaNote,PublishRoadStatus,PublishTime,'0' from inserted

create trigger trg_PUBLISHLASTREC_delete on PUBLISHLASTREC for delete

as

insert into dbo.PublishLastRec_SQL(modiid,SignalGUID,AreaNo,SignalNote,AreaNote,PublishRoadStatus,PublishTime,IsExec)

select '2',SignalGUID,AreaNo,SignalNote,AreaNote,PublishRoadStatus,PublishTime,'0' from deleted

所有的操作都是把各幻表的數據插入到一張表中,上面統一插入的表為PublishLastRec_SQL,記錄下操作的標識,以標識該條記錄是插入,刪除,還是修改,modiid等于1為insert,2為delete,3為update,字段isexec標識該條記錄是否已處理,0為未執行的,1為已執行的

接著就是最關鍵的一步,存儲過程

腳本如下:

ALTER PRoc pro_PublishLastRec_Sql

as

declare @modiid int

declare @signalguid int

declare @areano numeric(1,0)

declare @signalnote varchar(50)

declare @areanote varchar(50)

declare @publishroadstatus varchar(20)

declare @publishtime varchar(50)

if not exists(select * from PublishLastRec_SQL where IsExec=0)

begin

truncate table PublishLastRec_SQL

return

end

declare cur_sql cursor for

select modiid,SignalGUID,AreaNo,SignalNote,AreaNote,PublishRoadStatus,PublishTime from

PublishLastRec_SQL where IsExec=0 order by [id]--IsExec 0為未執行的,1為已執行的

open cur_sql

fetch next from cur_sql into @modiid,@SignalGUID,@AreaNo,@SignalNote,@AreaNote,@PublishRoadStatus,@PublishTime

while @@fetch_status=0

begin

if (@modiid=1) --插入

begin

insert into v_ora_PUBLISHLASTREC(SignalGUID,AreaNo,SignalNote,AreaNote,PublishRoadStatus,PublishTime)

values(@SignalGUID,@AreaNo,@SignalNote,@AreaNote,@PublishRoadStatus,@PublishTime)

end

if (@modiid=2) --刪除

begin

delete from v_ora_PUBLISHLASTREC where SignalGUID=@SignalGUID and AreaNo=@AreaNo

end

if (@modiid=3) --修改

begin

update v_ora_PUBLISHLASTREC

set SignalNote=@SignalNote,AreaNote=@AreaNote,PublishRoadStatus=@PublishRoadStatus,

PublishTime=@PublishTime

where SignalGUID=@SignalGUID and AreaNo=@AreaNo

end

update PublishLastRec_SQL

set IsExec=1

where current of cur_sql

fetch next from cur_sql into @modiid,@SignalGUID,@AreaNo,@SignalNote,@AreaNote,@PublishRoadStatus,@PublishTime

end

deallocate cur_sql

該存儲過程使用游標逐行提取PublishLastRec_Sql記錄,根據modiid判斷不同的數據操作,該條記錄處理完畢后把isexec字段更新為1.

最后是調用該存儲過程的作業,我們先建一個一分鐘運行一次的作業,然后在"步驟"的腳本中這樣寫:

DECLARE @dt datetime

SET @dt = DATEADD(minute, -1, GETDATE())

WHILE @dt < GETDATE()

BEGIN

EXEC pro_PublishLastRec_Sql --這里pro_PublishLastRec_Sql 為你要作業執行的存儲過程

WAITFOR DELAY '00:00:05' -- 等待5秒, 根據你的需要設置即可

END

現在，我們即可以實現5秒執行一次該存儲過程,做到5秒數據同步。