SQL Server-如何在更新命令上提示索引?

问题描述

我正在尝试执行以下命令，以强制更新使用非聚集索引:

I'm trying to execute the following command to force an update to use a non-clustered index:

 UPDATE Flights 
 SET Airtime=5555678
 WHERE Distance=10000
 OPTION (TABLE HINT(Flights, INDEX (DistanceIndex)))

...这是错误的:

对于如何正确地在TABLE HINT语句中形成语法，我找不到任何明确的建议.

I can't find any clear advice on how the syntax should be properly formed inside the TABLE HINT statement.

请问有人可以告诉我我要去哪里错了吗?

Please can anyone advise where I'm going wrong?

推荐答案

尝试以下操作:

UPDATE F
SET F.Airtime=5555678
FROM Flights F WITH (INDEX (DistanceIndex))
WHERE F.Distance=10000

或

UPDATE Flights
SET Airtime=5555678
FROM Flights -- this line is added to your initial query
WHERE Distance=10000
OPTION (TABLE HINT(Flights, INDEX (DistanceIndex)))

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