Question

我在SQL Server中使用以下代码执行MERGE（原谅我，但我是新手，我无法弄清楚如何通过复制粘贴正确缩进和格式化我的代码）：

MERGE INTO DW_Datawarehouse.[dbo].[DWF_WAREHOUSE] with (HOLDLOCK) AS target
USING #DataSource AS Source 
      ON target.[DWF_WAREHOUSE_ORDER_NUM] = source.[DWF_WAREHOUSE_ORDER_NUM]
         AND target.DWF_WAREHOUSE_ORDER_TYPE_CD = source.DWF_WAREHOUSE_ORDER_TYPE_CD

WHEN MATCHED AND 
      (
      --all non-key fields, attributes and amounts
        source.[DWF_WAREHOUSE_ORDER_DESC] <> target.[DWF_WAREHOUSE_ORDER_DESC]
        or source.[DWF_WAREHOUSE_PICK_DATE_DAY] <> target.[DWF_WAREHOUSE_PICK_DATE_DAY]
        or source.[DWF_WAREHOUSE_DAY_OF_WEEK_NUM] <> target.[DWF_WAREHOUSE_DAY_OF_WEEK_NUM]
        or source.[DWF_WAREHOUSE_DIFF_QTY] <> target.[DWF_WAREHOUSE_DIFF_QTY]
        )
   THEN 
      UPDATE  
      SET target.[DWF_WAREHOUSE_ORDER_DESC] = source.[DWF_WAREHOUSE_ORDER_DESC],
          target.[DWF_WAREHOUSE_PICK_DATE_DAY] = source.[DWF_WAREHOUSE_PICK_DATE_DAY],
          target.[DWF_WAREHOUSE_DAY_OF_WEEK_NUM] = source.[DWF_WAREHOUSE_DAY_OF_WEEK_NUM],
          target.[DWF_WAREHOUSE_DIFF_QTY] = source.[DWF_WAREHOUSE_DIFF_QTY]

WHEN NOT MATCHED BY TARGET THEN
    INSERT ([DWF_WAREHOUSE_ORDER_DESC], [DWF_WAREHOUSE_PICK_DATE_DAY],
            [DWF_WAREHOUSE_DAY_OF_WEEK_NUM], [DWF_WAREHOUSE_DIFF_QTY])
    VALUES (source.[DWF_WAREHOUSE_ORDER_DESC], source.[DWF_WAREHOUSE_PICK_DATE_DAY],
            source.[DWF_WAREHOUSE_DAY_OF_WEEK_NUM], source.[DWF_WAREHOUSE_DIFF_QTY])

WHEN NOT MATCHED BY SOURCE THEN
    DELETE;

我收到错误：

无法将值NULL插入列＆＃39; DWF_WAREHOUSE_ORDER_NUM＆＃39;， table＆＃39; DW_Datawarehouse.dbo.DWF_WAREHOUSE＆＃39 ;;列不允许空值。更新失败。

如何修改我的MERGE代码以避免此错误？

Answer 1

听起来数据源中存在DWF_WAREHOUSE_ORDER_NUM的null。您可以将数据源更改为

SELECT * FROM #DataSource AS WHERE DWF_WAREHOUSE_ORDER_NUM IS NOT NULL

示例：

MERGE INTO DW_Datawarehouse.[dbo].[DWF_WAREHOUSE] with (HOLDLOCK) as target
  USING
(SELECT * FROM #DataSource AS WHERE DWF_WAREHOUSE_ORDER_NUM IS NOT NULL)AS Source

  ON target.[DWF_WAREHOUSE_ORDER_NUM] = source.[DWF_WAREHOUSE_ORDER_NUM]
  AND target.DWF_WAREHOUSE_ORDER_TYPE_CD = source.DWF_WAREHOUSE_ORDER_TYPE_CD

WHEN MATCHED AND 
  (
  --all non-key fields, attributes and amounts
    source.[DWF_WAREHOUSE_ORDER_DESC] <> target.[DWF_WAREHOUSE_ORDER_DESC]
    or source.[DWF_WAREHOUSE_PICK_DATE_DAY] <> target.[DWF_WAREHOUSE_PICK_DATE_DAY]
    or source.[DWF_WAREHOUSE_DAY_OF_WEEK_NUM] <> target.[DWF_WAREHOUSE_DAY_OF_WEEK_NUM]
    or source.[DWF_WAREHOUSE_DIFF_QTY] <> target.[DWF_WAREHOUSE_DIFF_QTY]
    )
.....

SQL Server：MERGE导致无法将值NULL插入列

1 个答案: