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- 1When should I use primary key or index? - Stack Overflow
Basically, a primary key is (at the implementation level) a special kind of index. Specifically: ...
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不論索引的建立方式為何,每個資料表最多可以有999個非叢集索引:以隱含方式使用PRIMARY KEY 和UNIQUE 條件約束,或明確地使用 CREATE INDEX 。 跳到主...
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