以下 SQL Server 声明的含义是什么:datetime2(7)?

2022-01-03 00:00:00 datetime sql-server sql-server-2012

在 SQL Server 查询中,有:datetime2(7).
我知道datetime2,但我不明白(7).

Inside a SQL Server query, there is: datetime2(7).
I know datetime2, but I don't understand (7).

你能解释一下(7)的含义吗?

Can you explain the meaning of (7)?

推荐答案

datetime2 [ (fractional seconds precision) ]

根据 MSDN 文档,这是小数秒精度.

It's the fractional seconds precision according to the MSDN documentation.

http://msdn.microsoft.com/en-us/library/bb677335.aspx

这是微软4的例子:

DECLARE @datetime2 datetime2(4) = '12-10-25 12:32:10.1234';

所以我假设 7 是:

DECLARE @datetime2 datetime2(7) = '12-10-25 12:32:10.1234567';

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