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SQLServer执行计划成本(续4)

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2016-06-07 17:46:551121browse
InsertUpdateDelete

SQLServer3个写操作是INSERTUPDATEDELETEIUD)。如果加上约束、触发器和外键,写操作可以变得更复杂。这里仅关心基本的写操作。对于3个操作中的每一个,对于堆表和有聚集索引的表来说都有不同的图标,如图2-312-322-33所示。

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