Question

我有两张表，我想加入日期范围。表1如下所示：

Table 1:
----------------------------------------------------------------------------------
|    ID     |    Place    |     Description     |    Date 1    |     Date 2      |
----------------------------------------------------------------------------------
|         1 | Place 1     | Description 1       |     1/1/1988 |      12/31/1993 |
----------------------------------------------------------------------------------
|         2 | Place 1     | Description 2       |     1/1/1994 |      12/31/1994 |
----------------------------------------------------------------------------------
|         3 | Place 1     | Description 3       |     1/1/1995 |        2/8/2018 |
----------------------------------------------------------------------------------

表2如下所示：

Table 2:
---------------------------------------------------------------------------------
|    ID     |     Equipment      |    Place    |    Date 1    |     Date 2      |
---------------------------------------------------------------------------------
|         1 | Item 1             | Place 1     |     1/1/1990 |      12/31/1995 |
---------------------------------------------------------------------------------
|         2 | Item 2             | Place 1     |     1/1/1996 |        2/8/2018 |
---------------------------------------------------------------------------------

我希望结果如下：

Results:
------------------------------------------------------------------------------------------
|     Equipment      |    Place    |    Description     |    Date 1    |     Date 2      |
------------------------------------------------------------------------------------------
| Item 1             | Place 1     | Description 1      |     1/1/1990 |      12/31/1993 |
------------------------------------------------------------------------------------------
| Item 1             | Place 1     | Description 2      |     1/1/1994 |      12/31/1994 |
------------------------------------------------------------------------------------------
| Item 1             | Place 1     | Description 3      |     1/1/1995 |      12/31/1995 |
------------------------------------------------------------------------------------------
| Item 2             | Place 1     | Description 3      |     1/1/1996 |        2/8/2018 |
------------------------------------------------------------------------------------------

在上面的示例中，我基本上尝试将“描述”添加到表2.但是，表1中的“描述”与表2中的记录集没有相同的日期范围。

我正在努力想出一个查询，甚至是一组查询来生成所需的结果。任何推动都是正确的方向，非常感谢。

Answer 1

您将需要一个主要从表2中获取的查询，然后对表1执行具有多个条件的双向连接。第一个连接将到位，第二个连接也需要加入日期范围：

粗糙的SQL将是（免责声明：未经测试）：

SELECT 
    T2.[Description], T2.[Place], T1.[Description], etc..
FROM
    T2
INNER JOIN T1 ON 
    T1.[Place] = T2.[Place]
AND 
    (
       T2.[Date 1] BETWEEN T1.[Date 1] AND T1.[Date 2]
       AND
       T2.[Date 2] BETWEEN T1.[Date 1] AND T1.[Date 2]
    )

Microsoft Access使用日期范围

1 个答案: