输入为24小时或48小时时如何不能看到小时数的0值

Question

DECLARE @Hours AS INT 
DECLARE @SubtractDate AS DATETIME 

SET @Hours=24 /* User input to have hours */ 
SET @SubtractDate=DATEADD(hh,@Hours,GETDATE()) - GETDATE() 

if @Hours>=24 


SELECT CONVERT(VARCHAR(10),DATEDIFF(DAY,'1900-01-01',@SubtractDate))+ ' Day(s) ' + 
CONVERT(VARCHAR(10),DATEPART(hh,@SubtractDate))+ ' Hour(s) 'AS [Result] 

Else 
SELECT CONVERT(VARCHAR(10),DATEPART(hh,@SubtractDate))+ ' Hour(s) ' AS [Result] 

编辑：复制粘贴从评论。

当输入：

SET @Hours=24 /* User input to have hours/

所需的结果将是：1 Day相反，它示出了：1 Day(s) 0 Hour(s)

另外：当输入：

SET @Hours=48/User input to have hours */ 

所需的结果将是：2 Days代替，它显示：2 Day(s) 0 Hour(s)

Answer 1

使用CASE检查是否应该使用小时零件。

查询

DECLARE @Hours AS INT 
DECLARE @SubtractDate AS DATETIME 

SET @Hours=24/* User input to have hours */ 
SET @SubtractDate=DATEADD(hh,@Hours,GETDATE()) - GETDATE() 

if @Hours>=24 


SELECT 
    CONVERT(VARCHAR(10),DATEDIFF(DAY,'1900-01-01',@SubtractDate))+ ' Day(s) ' + 

    + 

    CASE 
    WHEN CONVERT(VARCHAR(10),DATEPART(hh,@SubtractDate)) > 0 
    THEN CONVERT(VARCHAR(10),DATEPART(hh,@SubtractDate)) + ' Hour(s)' 
    ELSE '' 
    END 

    AS [Result] 

Else 
    SELECT 
    CONVERT(VARCHAR(10),DATEPART(hh,@SubtractDate))+ ' Hour(s) ' 
    AS [Result] 

结果集@时间= 24

| Result | 
|-----------| 
| 1 Day(s) | 

结果集@小时= 25

|    Result | 
|--------------------| 
| 1 Day(s) 1 Hour(s) | 

结果SET @小时= 48

| Result | 
|-----------| 
| 2 Day(s) | 

编辑：输出格式化

查询

DECLARE @Hours AS INT 
DECLARE @SubtractDate AS DATETIME 

SET @Hours=1/* User input to have hours */ 
SET @SubtractDate=DATEADD(hh,@Hours,GETDATE()) - GETDATE() 

if @Hours>=24 


SELECT 
    CASE 
    WHEN CONVERT(VARCHAR(10),DATEDIFF(DAY,'1900-01-01',@SubtractDate)) = 1 
    THEN CONVERT(VARCHAR(10),DATEDIFF(DAY,'1900-01-01',@SubtractDate))+ ' Day ' 

    WHEN CONVERT(VARCHAR(10),DATEDIFF(DAY,'1900-01-01',@SubtractDate)) >= 2 
    THEN CONVERT(VARCHAR(10),DATEDIFF(DAY,'1900-01-01',@SubtractDate))+ ' Days ' 
    END 

    + 

    CASE 
    WHEN CONVERT(VARCHAR(10),DATEPART(hh,@SubtractDate)) > 0 
    THEN CASE 
      WHEN CONVERT(VARCHAR(10),DATEPART(hh,@SubtractDate)) = 1 
      THEN CONVERT(VARCHAR(10),DATEPART(hh,@SubtractDate)) + ' Hour' 

      WHEN CONVERT(VARCHAR(10),DATEPART(hh,@SubtractDate)) >= 2 
      THEN CONVERT(VARCHAR(10),DATEPART(hh,@SubtractDate)) + ' Hours'   
     END 
    ELSE '' 
    END 

    AS [Result] 

Else 
    SELECT 
    CASE 
    WHEN CONVERT(VARCHAR(10),DATEPART(hh,@SubtractDate)) > 0 
    THEN CASE 
      WHEN CONVERT(VARCHAR(10),DATEPART(hh,@SubtractDate)) = 1 
      THEN CONVERT(VARCHAR(10),DATEPART(hh,@SubtractDate)) + ' Hour' 

      WHEN CONVERT(VARCHAR(10),DATEPART(hh,@SubtractDate)) >= 2 
      THEN CONVERT(VARCHAR(10),DATEPART(hh,@SubtractDate)) + ' Hours'   
     END 
    ELSE '' 
    END 
    AS [Result] 

结果集@小时= 1

| Result | 
|--------| 
| 1 Hour | 

结果集@小时= 2

| Result | 
|---------| 
| 2 Hours | 

结果集@时间= 24

| Result | 
|--------| 
| 1 Day | 

结果集@小时= 25

|    Result | 
|--------------------| 
| 1 Day 1 Hour  | 

结果集@小时数= 26

|  Result | 
|---------------| 
| 1 Day 2 Hours | 

结果集@小时= 48

| Result | 
|-----------| 
| 2 Days |