MS SQL Server：以小时和分钟的精度计算年龄

Question

我需要一个 SQL 函数来计算年龄。它必须准确并涵盖所有极端情况。
是给婴儿的医院病房，所以30小步的年龄是很常见的情况。

我查看了其他答案，但找不到适用于所有情况的答案。

例如：

• 2014-04-29 12:59:00.000 出生的宝宝。
• 现在是 2014-04-29 13:10:23.000，

年龄应为 0 岁、0 个月、0 天、0 小时、11 分钟

如果有人可以提供该功能的最终和最终版本，那就太好了。

（恐怕简单的 DateDiff 解决方案不够好。正如更流行的question 所述：“Datediff 函数不能很好地处理年份边界......”

Answer 1

此查询将以分钟为单位为您提供日期差异，

select datediff(mi, '2014-04-23 05:23:59.660',getdate())

然后您可以简单地计算minutes/60 为hours 和minutes mod 60 为minutes

select datediff(mi, '2014-04-23 05:23:59.660',getdate())/60 as [Hours], select datediff(mi, '2014-04-23 05:23:59.660',getdate()) % 60 as [Minutes]

Answer 2

我们可以使用DATEDIFF 得到年、月、日的差异，然后简单除以秒、分钟和小时的差异。

我已使用@CurrentDate 重新创建原始请求，但@CurrentDate = GETDATE() 将返回执行时的年龄。

DECLARE @BirthDate DATETIME
DECLARE @CurrentDate DATETIME
SET @BirthDate = '2014-04-29 12:59:00.000'
SET @CurrentDate = '2014-04-29 13:10:23.000'

DECLARE @DiffInYears INT
DECLARE @DiffInMonths INT
DECLARE @DiffInDays INT
DECLARE @DiffInHours INT
DECLARE @DiffInMinutes INT
DECLARE @DiffInSeconds INT
DECLARE @TotalSeconds BIGINT


-- Determine Year, Month, and Day differences
SET @DiffInYears = DATEDIFF(year, @BirthDate, @CurrentDate)
IF @DiffInYears > 0
    SET @BirthDate = DATEADD(year, @DiffInYears, @BirthDate)
IF @BirthDate > @CurrentDate
BEGIN
    -- Adjust for pushing @BirthDate into future
    SET @DiffInYears = @DiffInYears - 1
    SET @BirthDate = DATEADD(year, -1, @BirthDate)
END

SET @DiffInMonths = DATEDIFF(month, @BirthDate, @CurrentDate)
IF @DiffInMonths > 0
    SET @BirthDate = DATEADD(month, @DiffInMonths, @BirthDate)
IF @BirthDate > @CurrentDate
BEGIN
    -- Adjust for pushing @BirthDate into future
    SET @DiffInMonths = @DiffInMonths - 1
    SET @BirthDate = DATEADD(month, -1, @BirthDate)
END

SET @DiffInDays = DATEDIFF(day, @BirthDate, @CurrentDate)
IF @DiffInDays > 0
    SET @BirthDate = DATEADD(day, @DiffInDays, @BirthDate)
IF @BirthDate > @CurrentDate
BEGIN
    -- Adjust for pushing @BirthDate into future
    SET @DiffInDays = @DiffInDays - 1
    SET @BirthDate = DATEADD(day, -1, @BirthDate)
END

-- Get number of seconds difference for Hour, Minute, Second differences
SET @TotalSeconds = DATEDIFF(second, @BirthDate, @CurrentDate)

-- Determine Seconds, Minutes, Hours differences
SET @DiffInSeconds = @TotalSeconds % 60
SET @TotalSeconds = @TotalSeconds / 60

SET @DiffInMinutes = @TotalSeconds % 60
SET @TotalSeconds = @TotalSeconds / 60

SET @DiffInHours = @TotalSeconds


-- Display results
 SELECT @DiffInYears AS YearsDiff,
        @DiffInMonths AS MonthsDiff,
        @DiffInDays AS DaysDiff,
        @DiffInHours AS HoursDiff,
        @DiffInMinutes AS MinutesDiff,
        @DiffInSeconds AS SecondsDiff

Answer 3

它会在几秒钟内给你date diffselect datediff(s, '2014-04-23 05:23:59.660',getdate())