查询最佳实践

Question

两次查询中的最佳做法 和运行sql server的速度

SELECT *
FROM AppInfra.Person 
INNER JOIN  Gnr.PersonAddress ON PersonAddress.PersonId = Person.Id 
                             AND PersonAddress.AddressTypeId = 2

OR

SELECT *
FROM AppInfra.Person 
INNER JOIN Gnr.PersonAddress ON PersonAddress.PersonId = Person.Id
WHERE PersonAddress.AddressTypeId = 2

Answer 1

认为这两种情况之间确实没有可测量的性能差异。

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Answer 2

因为它是{{1}}，所以不会有什么大不同。

请参阅： SQL Filter criteria in join criteria or where clause which is more efficient