sql - 如何在 SQL Server 中使用存储过程合并第三个表中的两个数据表？

Question

表1

-----------------------------
Id      | Batch    |   Qty
-----------------------------
   1       A1         5     
   2       A2         5      
   3       A3         5    
   4       A4         5

表2

-----------------------------
Id     | Batch  | Qty
------------------- ----------
1         A1        6    
2         A2        6    
3         A3        6     
5         A5       10

预期结果

-----------------------------
Id     | Batch  | Qty
-----------------------------    
1         A1       6 (Qty updated)    
2         A2       6 (Qty updated)    
3         A3       6 (Qty updated)    
4         A4       5 (remains as same)    
5         A5       10 (row in table 2)

如何在 SQL Server 中实现这一点？如果有人知道这个数据表操作请分享..

Answer 1

您可以使用 MERGE根据表 2 更新表 1 的查询:

MERGE INTO Table1 as target
USING Table2 as source
ON (target.id = source.id)
WHEN MATCHED THEN 
    UPDATE SET target.Batch = source.Batch, 
               target.Qty = source.Qty
WHEN NOT MATCHED THEN   
    INSERT (Id, Batch, Qty)
    VALUES (source.Id, source.Batch, source.Qty)