Question

我需要一个SQL查询，允许我显示处理发票的剩余天数，此查询应指明在自动取消之前授权报价的剩余时间，即未处理的7天和7天用于部分处理。

任何人都可以帮助我吗？

EG。如果今天有报价，它应该显示14天，明天13天等。

Answer 1

您没有提供数据，因此这里是基于虚拟数据的示例。正如评论中提到的，您需要使用DATEDIFF函数。但是，在您发现日期之间的天数之前，您应该在DATEADD函数的帮助下将14添加到发票日期。这将为您提供所需的倒计时效果：

;WITH invoices AS (
SELECT  1 as invoice_num,
        '2016-07-10' as invoice_date,
        1 as invoice_status
UNION ALL
SELECT  2,
        '2016-07-01',
        1
UNION ALL
SELECT  3,
        '2016-07-12',
        2
UNION ALL
SELECT  4,
        '2016-07-18',
        2
), invoice_statuses AS (
SELECT  1 as invoice_status, 
        'un-processed' as status_description
UNION ALL
SELECT  2, 
        'partially processed'
)


SELECT  i.invoice_num, 
        i.invoice_date,
        s.status_description,
        DATEDIFF(day,GETDATE(),DATEADD(day,
            CASE WHEN i.invoice_status = 1 THEN 14 
                 WHEN i.invoice_status = 2 THEN 7
                 ELSE 0 END
                            ,i.invoice_date)) as days_left
FROM invoices i
LEFT JOIN invoice_statuses s 
    ON s.invoice_status = i.invoice_status

输出将是：

invoice_num invoice_date    status_description  days_left
1           2016-07-10      un-processed        4
2           2016-07-01      un-processed        -5
3           2016-07-12      partially processed -1
4           2016-07-18      partially processed 5

如果您将GETDATE()更改为2016-07-21，则输出将为：

invoice_num invoice_date    status_description  days_left
1           2016-07-10      un-processed        3
2           2016-07-01      un-processed        -6
3           2016-07-12      partially processed -2
4           2016-07-18      partially processed 4

Answer 2

正如评论中所提到的，使用DATEDIFF函数可以轻松实现这一点：

DECLARE @InvoiceDate DATE = '2016-08-01';
SELECT DATEDIFF(DAY, GETDATE(), @InvoiceDate);

Answer 3

要获取取消日期，您需要剩余7天或14天的初始日期（取决于状态）

这是一个例子

declare @datStart as date = '2016-07-15';  --an initial start date
declare @proc as nvarchar(1) = 'U';  --unprocessed

--this would give a final process ing date
SELECT case when @proc ='U' THEN DATEADD(DAY, 14, @datStart) ELSE DATEADD(DAY, 7, @datStart) END

--this gives you days unil the delete date
SELECT datediff(day,getdate(), case when @proc ='U' THEN DATEADD(DAY, 14, @datStart) ELSE DATEADD(DAY, 7, @datStart) END)

计算在SQL Server中使用的剩余天数

3 个答案: