在 SQL 查询中减去日期时间
我有一个我正在尝试编写的 Sql 视图，我希望能够获取我的 DateTime 字段(称为 OrderDate)，然后从当前时间中减去它(GetDate())以显示它在自 OrderDate 起的天数.有人可以帮忙吗?
I have a Sql view Im trying to write and I'd like to be able to take my DateTime Field (called OrderDate) and then subtract it from the current Time (GetDate()) to show me how long its been in days since the OrderDate. Can someone help out?
谢谢
推荐答案
我假设您正在使用 SQL Server，因为您提到了 T-SQL GETDATE() 函数.
I am assuming you are using SQL Server, since you mention the T-SQL GETDATE() function.
要计算两个日期之间的差异，请使用 DATEDIFF函数:
For calculations on differences between two date, use the DATEDIFF function:
SELECT DATEDIFF(day, OrderDate, GETDATE())
FROM myTable
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