求帮写一条修改SQL语句（在线等待）

                                                                            
[解决办法]

UPDATE a SET Fid=b.id
FROM #ta2 a
JOIN #ta1 b ON a.Ftx=b.tx

[解决办法]
update a set fid=b.id
from #ta2 a
,#ta1 b where a.ftx=b.tx
[解决办法]



create table #ta1(id int ,tx varchar(20))
go
insert into #ta1
select 1,'小明' union all
select 2,'小红' union all
select 3,'小李' 
go
create table #ta2(id int,Ftx varchar(20),Fid int)
go
insert into #ta2
select 1,'小明',0 union all
select 2,'小明',0 union all
select 3,'小李',0 union all
select 4,'小李',0 union all
select 5,'小军',0 union all
select 6,'小军',0 


update #ta2
set Fid = t1.id
from #ta2 t2
inner join #ta1 t1
        on t2.Ftx = t1.tx


select * 
from #ta2
/*
idFtxFid
1小明1
2小明1
3小李3
4小李3
5小军0
6小军0
*/