SQL Server：将Datetime2转换为time（7）

Question

I am trying to compare a datetime2 with a time(7)

I need help converting the datatime2 .

This is what I've tried:

DECLARE @PracticeStartTime time(7)
DECLARE @PracticeEndTime time(7)

SET @PracticeStartTime = (
    SELECT PBH.StartTime
    FROM PracticePractitioner AS PP WITH (NOLOCK)
    LEFT JOIN PracticeBusinessHours AS PBH WITH (NOLOCK)
        ON PBH.PracticeId = PP.PracticeId
    WHERE PP.PractitionerId = @PractitionerId
    )
SET @PracticeEndTime = (
    SELECT PBH.EndTime
    FROM PracticePractitioner AS PP WITH (NOLOCK)
    LEFT JOIN PracticeBusinessHours AS PBH WITH (NOLOCK)
        ON PBH.PracticeId = PP.PracticeId
    WHERE PP.PractitionerId = @PractitionerId
    )

IF (
    (
        CONVERT(@ScheduledStart AS TIME) BETWEEN @PracticeStartTime
            AND @PracticeEndTime
        )
    AND (
        CONVERT(@ScheduledEnd AS TIME) BETWEEN @PracticeStartTime
            AND @PracticeEndTime
        )
    )
BEGIN
    PRINT 'Time within practice hours';
END
ELSE
BEGIN
    RETURN - 1
END

Answer 1

Your syntax is off.

I would use CAST

cast(@ScheduledStart as time(7))

You could use CONVERT

convert(time(7), @ScheduledStart)