sql复制一条相同的记录最快最好的办法。
SQL 小技巧
SET IDENTITY_INSERT Table1 On
insert into Table1 (unic,Id,UserName,Text) select newid(),(select top 1 Id from table1 order by id desc)+1,UserName,Text from table1 where unic='9509f20d-e297-478b-9cc7-17675bfd8e2a'
SET IDENTITY_INSERT Table1 Off
注:Unic为NewID ID为标识列 Text为Text类型
简单吧。