SQLテーブルの列から別の列への値の更新

Question

私は更新したい行を識別する単純なSELECT文を持っています。基本的に私は、vb_descriptionにvad_descriptionをコピーしたいと思っています。どんな助けもありがとう。

SELECT 
    variant_bom.vb_id 
,variant_bom.vb_description 
,variant_detail.vad_description 
FROM dbo.variant_bom 
INNER JOIN dbo.variant_detail 
    ON variant_bom.vb_vad_id = variant_detail.vad_id 
INNER JOIN dbo.variant_setting 
    ON variant_setting.vas_vad_id = variant_detail.vad_id 
WHERE variant_setting.vas_manufactured_variant = 1 
AND variant_setting.vas_discontinued_product = 0 

Answer 1

テーブルにAlias名前を与えるこの

UPDATE vb 
SET vb.vb_description = vd.vad_description 
FROM dbo.variant_bom vb 
     INNER JOIN dbo.variant_detail vd 
       ON vb.vb_vad_id = vd.vad_id 
     INNER JOIN dbo.variant_setting vs 
       ON vs.vas_vad_id = vd.vad_id 
WHERE vs.vas_manufactured_variant = 1 
     AND vs.vas_discontinued_product = 0 

のようなものがすごい