Oracle SQL - 选择交货行后的第一个检验行

Question

我正在努力解决以下问题。

tblTrans中的数据如下：

| Transaction_ID |    Transaction_Type   | Hours | Employee_ID |
|:--------------:|:---------------------:|:-----:|:-----------:|
|       107      |   In-Place Delivery   |  0.60 |     SDK     |
|       110      |   In-Place Delivery   |  0.88 |     SDK     |
|       112      |       Inspection      |  1.22 |     SDK     |
|       114      |   In-Place Delivery   |  2.11 |     JMK     |
|       115      |       Inspection      |  0.01 |     SDK     |
|       116      |       Inspection      |  0.64 |     JMK     |
|       239      | Out-of-Place Delivery |  0.12 |     JMK     |
|       241      |   In-Place Delivery   |  0.33 |     JMK     |
|       255      | Out-of-Place Delivery |  0.87 |     KWE     |
|       256      |       Inspection      |  5.90 |     JMK     |
|       263      |       Inspection      | 11.80 |     SDK     |
|       291      |   In-Place-Delivery   |  1.00 |     SDK     |
|       292      |       Inspection      |  0.04 |     JMK     |
|       400      | Out-of-Place Delivery |  9.50 |     JMK     |
|       401      |       Inspection      |  1.21 |     JMK     |

我想要完成的是在 每次就地交付 之后确定 第一次检验交易 ，创建一个 table 看起来像：

| Delivery_Transaction_ID | First_Inspection |
|:-----------------------:|:----------------:|
|           107           |        112       |
|           110           |        112       |
|           114           |        115       |
|           241           |        256       |
|           291           |        292       |

交货后即将进行的检查的 Transaction_ID 将始终大于之前的交货。它按顺序进行。但是，它可能不一定是 +1，因为有时系统会跳号。但是，它永远会更大。

到目前为止，我已经尝试了以下查询的几个变体：

WITH
  In_Place_Deliveries AS (  
      SELECT
        Transaction_ID AS Delivery_Transaction    
      FROM
        tblTrans    
      WHERE
        Transaction_Type = 'In-Place Delivery'  
  ),


  SELECT
    ipd.Delivery_Transaction,
    LEAD(MIN(Transaction_ID)) OVER (ORDER BY Transaction_Type) AS "First_Inspection"
  FROM
    tblTrans
      INNER JOIN In_Place_Deliveries ipd on ipd.Delivery_Transaction = tblTrans.Transaction_ID

但我得到：

| DELIVERY_TRANSACTION | First_Inspection |
|:--------------------:|:----------------:|
|          107         |        110       |
|          110         |        114       |
|          114         |        241       |
|          241         |      (null)      |

这显然是不正确的。

我在这里设置了一个 SQL FIDDLE，用于演示目的，包含数据和查询。

如何重新设计查询以获得所需的输出？

Answer 1

简单地使用 LEAD IGNORE NULLS:

WITH In_Place_Deliveries AS 
 (  
      SELECT
        Transaction_ID AS Delivery_Transaction ,
        Transaction_Type,
        -- next Inspection
        lead(case when Transaction_Type = 'Inspection' then Transaction_ID end ignore nulls)
        OVER (ORDER BY Transaction_ID)
      FROM
        tblTrans    
      WHERE
        Transaction_Type IN ( 'In-Place Delivery', 'Inspection')
  )
SELECT *
FROM In_Place_Deliveries
WHERE Transaction_Type = 'In-Place Delivery'

见fiddle

Oracle SQL - 选择交货行后的第一个检验行

Oracle SQL - Selecting first inspection row after delivery row

sql

oracle

row

oracle11g