轉換tsql插入更新是否正確？

Question

所以我將插入語句轉換爲更新語句。

這裏是插入

insert into Matches(
    SourceID, 
    SourceUniqueID, 
    ExtractionNumber, 
    ItemID, 
    MatchDate, 
    MatchBy, 
    MatchMethod) 
    select 
     m.SourceID 
    ,m.SourceUniqueID 
    ,m.ExtractionNumber 
    ,m.ExtractionNumber 
    ,getdate() 
    ,replace(suser_sname(),'Bob\','') 
    ,'EMTransmittalnumber' 
    from MatchData as m 
    where m.SourceID = 19 

這裏是更新語句我有這麼遠，但它產生錯誤

update m2 set 
    m2.SourceID = m.SourceID 
, m2.SourceUniqueID = m.SourceUniqueID 
, m2.ExtractionNumber = m.ExtractionNumber 
, m2.ItemID = m.ExtractionNumber 
, m2.MatchDate = getdate() 
, m2.MatchBy = replace(suser_sname(),'Bob\','') 
, m2.MatchMethod = 'EMTransmittalnumber' 
from MatchData as m 
    inner join Matches as m2 
    m2.itemid = m.extractionnumber 
    where m.sourceid = 19 

錯誤表示不正確的語法附近「M2」

任何想法？

Answer 1

是的，你忘了 「上的」 內部連接：

update m2 set 
    m2.SourceID = m.SourceID 
, m2.SourceUniqueID = m.SourceUniqueID 
, m2.ExtractionNumber = m.ExtractionNumber 
, m2.ItemID = m.ExtractionNumber 
, m2.MatchDate = getdate() 
, m2.MatchBy = replace(suser_sname(),'Bob\','') 
, m2.MatchMethod = 'EMTransmittalnumber' 
from MatchData as m 
    inner join Matches as m2 on 
    m2.itemid = m.extractionnumber 
    where m.sourceid = 19