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mssql insert into 和insert into select性能比较

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Jun 07, 2016 pm 06:00 PM

今天没事，测了一下insert into和insert into select的性能，没想到这两个性能差别这么大。

使用insert into table(field, ...)values(value, ...),insert into table(field, ...)values(value, ...)...的情况

使用insert into table(field, ...)select(value，...) union all select(value，...) union all select(value，...) ...的情况

我一次插入的数据是：1190条。用insert into所用的时间在510毫秒上下徘徊，而用insert into select所用的时间在16毫秒上下徘徊。

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