如何将一个表某个字段更新进另一个表

一开始以为要用游标，但没想到网上有高人指点，代码如下：

update yc.dbo.T_CUST_CUSTINFO_12 
set  yc.dbo.T_CUST_CUSTINFO_12.a611=n.a611,
yc.dbo.T_CUST_CUSTINFO_12.a612=n.a612,
yc.dbo.T_CUST_CUSTINFO_12.a613=n.a613,
yc.dbo.T_CUST_CUSTINFO_12.a614=n.a614,
yc.dbo.T_CUST_CUSTINFO_12.a615=n.a615,
yc.dbo.T_CUST_CUSTINFO_12.a616=n.a616,
yc.dbo.T_CUST_CUSTINFO_12.a617=n.a617,
yc.dbo.T_CUST_CUSTINFO_12.a618=n.a618,

yc.dbo.T_CUST_CUSTINFO_12.a622=n.a622,
yc.dbo.T_CUST_CUSTINFO_12.a623=n.a623,
yc.dbo.T_CUST_CUSTINFO_12.a624=n.a624,
yc.dbo.T_CUST_CUSTINFO_12.a625=n.a625,
yc.dbo.T_CUST_CUSTINFO_12.a626=n.a626,

yc.dbo.T_CUST_CUSTINFO_12.a629=n.a629,
yc.dbo.T_CUST_CUSTINFO_12.a630=n.a630,
yc.dbo.T_CUST_CUSTINFO_12.a631=n.a631
from yc.dbo.T_CUST_CUSTINFO_12  o left join T_CUST_CUSTINFO_12 n
on o.id=n.id

 

REF URL：http://www.360doc.com/content/08/1118/16/16915_1951567.shtml#

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ps:不仅是2表，多表也可以，请看下面的例子：

select * into #t from temp_easypart  where AD_CusI_cgshbm='GBB00122' and IsDealed = 1



update [Ad_CustomerIntegral] --(18575 行受影响)
set AD_CusI_hdjf =round(#t.AD_CusI_dgsl*convert(numeric(18,2),r.AD_CIR_bjfbl),0,0)
from #t 
                   inner join Customer c on #t.AD_CusI_cgshbm collate SQL_Latin1_General_CP1_CI_AS = c.Username
                   inner join AD_BoshProductInfo p on #t.AD_CusI_cpbm = p.AD_boProI_cpbh
                   inner join AD_cIntegralrule r on p.AD_boProI_zdbh = r.AD_CIR_bcpbh and r.AD_CIR_bjxslx = c.Delertype_id
                   inner join Ad_CustomerIntegral i 
                            on i.AD_CusI_cgshbm collate SQL_Latin1_General_CP1_CI_AS = c.Username
                                     and i.AD_CusI_cpbm collate SQL_Latin1_General_CP1_CI_AS = p.AD_boProI_cpbh
                                     and i.AD_CusI_ddbh = #t.AD_CusI_ddbh collate SQL_Latin1_General_CP1_CI_AS