右键加入多键无效的键

Question

我需要船长的帮助，显然我猜。我试图从表格中插入数据到一个可变的表格中。好吧，这很容易

我需要插入我们今天得到的数据和我们在10天前得到的数据。 where子句可以aford它，日的还好

什么对我来说是难是插入今天的数据，只有当它不存在于数据显示在10天前

我用的是表的为例（[数据表）：

Date Purchase Line_Purchase 
--------------------------------------------------------------------------- 
2017-04-29 0000002 01 
2017-04-29 0000002 02 
2017-04-29 0000003 01 
2017-04-29 0000003 02 
2017-04-29 0000003 03 
2017-04-29 0000004 01 
2017-04-29 0000005 01 
2017-04-19 0000001 01 
2017-04-19 0000001 02 
2017-04-19 0000001 03 
2017-04-19 0000002 01 
2017-04-19 0000002 02 

我所需的表temptable：

Input_date Purchase Line_Purchase 
------------------------------------------------------------------------- 
2017-04-19 0000001 01 
2017-04-19 0000001 02 
2017-04-19 0000001 03 
2017-04-19 0000002 01 
2017-04-19 0000002 02 
2017-04-29 0000003 01 
2017-04-29 0000003 02 
2017-04-29 0000003 03 
2017-04-29 0000004 01 
2017-04-29 0000005 01 

有什么要求可以在SQL中可以改变这种状况？

我试过这样

INSERT INTO #TEMPTABLE 
    (Input_date ,Purchase ,Line_Purchase) 
SELECT 
    table.Date 
    ,table.Purchase 
    ,table.Line_Purchase 
FROM 
    datatable table 
WHERE 
    convert(date, table.Date) = convert(date, GETDATE() - 10) 


INSERT INTO #TEMPTABLE 
    (Input_date ,Purchase ,Line_Purchase) 
SELECT 
    table.Date 
    ,table.Purchase 
    ,table.Line_Purchase 
FROM 
    datatable table 
    RIGHT JOIN #TEMPTABLE temp 
     on table.Purchase = temp.Purchase and table.Line_Purchase = temp.Line_Purchase 
WHERE 
    convert(date, table.Date) = convert(date, GETDATE()) 
    AND (temp.Purchase is null AND temp.Line_Purchase is null) 

在此先感谢

Answer 1

你可以用not exists()做到这一点：

select date as Input_date, Purchase, Line_Purchase 
into #temptable 
from t 
where date = '2017-04-19' --convert(date, getdate() - 10); 

insert into #temptable (Input_date, Purchase, Line_Purchase) 
select * 
from t 
where date = '2017-04-29' 
    and not exists (
    select 1 
    from t as i 
    where i.purchase=t.purchase 
     and i.line_purchase=t.line_purchase 
     and i.date = '2017-04-19' --convert(date, getdate() - 10) 
    ); 

select * 
from #temptable; 

rextester演示：http://rextester.com/SAQSG21367

回报：

+------------+----------+---------------+ 
| Input_Date | Purchase | Line_Purchase | 
+------------+----------+---------------+ 
| 2017-04-19 | 0000001 |   01 | 
| 2017-04-19 | 0000001 |   02 | 
| 2017-04-19 | 0000001 |   03 | 
| 2017-04-19 | 0000002 |   01 | 
| 2017-04-19 | 0000002 |   02 | 
| 2017-04-29 | 0000003 |   01 | 
| 2017-04-29 | 0000003 |   02 | 
| 2017-04-29 | 0000003 |   03 | 
| 2017-04-29 | 0000004 |   01 | 
| 2017-04-29 | 0000005 |   01 | 
+------------+----------+---------------+ 

---

可选，如果你是在同一时间做这两项操作，您可以使用带有row_number() 派生表/子查询或common table expression做在同一个查询;

;with cte as (
select date, Purchase, Line_Purchase 
    , rn = row_number() over (partition by Purchase,Line_Purchase order by date) 
from t 
--where date in ('2017-09-26','2017-09-16') 
where date in (convert(date, getdate()), convert(date, getdate()-10)) 
) 
select date as Input_date, Purchase, Line_Purchase 
into #temptable 
from cte 
where rn = 1 

select * 
from #temptable; 

rextester演示：http://rextester.com/QMF5992

回报：

+------------+----------+---------------+ 
| Input_date | Purchase | Line_Purchase | 
+------------+----------+---------------+ 
| 2017-09-16 | 0000001 |   01 | 
| 2017-09-16 | 0000001 |   02 | 
| 2017-09-16 | 0000001 |   03 | 
| 2017-09-16 | 0000002 |   01 | 
| 2017-09-16 | 0000002 |   02 | 
| 2017-09-26 | 0000003 |   01 | 
| 2017-09-26 | 0000003 |   02 | 
| 2017-09-26 | 0000003 |   03 | 
| 2017-09-26 | 0000004 |   01 | 
| 2017-09-26 | 0000005 |   01 | 
+------------+----------+---------------+