SQL语句复制父子级表数据

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--第一步：复制全部数据
Insert Into Book(text,pid) Select a.text,a.pid From Book a where 条件

--第二步：创建变量表
declare @t table(idx int,id int,pid int,id2 int,pid2 int)
Insert Into @t
select ROW_NUMBER() OVER (ORDER BY a.pid) AS idx,a.id,a.pid,b.id id2,b.pid pid2
from Book a inner join Book b on b.text=a.text and b.pid=a.pid where 条件

--第三步：修改新数据的pid
update Book set pid=c.id2
from @t a
inner join @t b on b.pid=a.id
inner join @t c on c.idx=a.idx

SQL语句复制父子级表数据

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