update test2 set test2.dScore=isnull((select test1.dScore
from test1
where test2.cName=test1.cName and test2.cKecheng=test1.cKecheng),0)
where test2.cName=test1.cName and test2.cKecheng=test1.cKecheng
列前缀 'test1' 与查询中所用的表名或别名不匹配。
哪里出问题了，求助?
------解决方案--------------------
“test2.dScore=”改為“dScore=”試試
------解决方案--------------------
UPDATE test2
SET test2.dscore = ISNULL(test1.sScore)
FROM test1
WHERE test2.cName = test1.cName
AND test2.cKecheng = test1.cKecheng
------解决方案--------------------
UPDATE test2
SET test2.dScore=ISNULL(test1.dScore ,0)
FROM test1
WHERE test2.cName=test1.cName and test2.cKecheng=test1.cKecheng
------解决方案--------------------
--試試以下：
UPDATE test2 SET dScore = ISNULL(test1.dScore, 0)
from test2
LEFT JOIN test1 on test2.cName = test1.cName AND test2.cKecheng = test1.cKecheng