SQL Server中的数据合并与转置问题：多订单多商品行数据处理

Got it, let's break down your table setup clearly for you:

Table 1 Key Details #

• Order Unique Identifier: SOP Number — this acts as the unique ID for each order. For example, INVO23935 and INV023937 are completely separate, independent orders.
• Row Item Organization: Every distinct product (or quantity grouping) within an order gets its own dedicated row. A single order can include multiple entries for the same product or different ones:
  • Example: Order INVO23935 has two rows: one for 3 units of Product X, another for 1 unit of Product Y
  • Products can appear across multiple orders: Order INV023948 also includes 1 unit of Product X
• Row Unique Identifier: line column — this is the unique ID for each individual row entry in the table.
• Product Scale: You currently have thousands of distinct products, and new products are being added continuously.

内容的提问来源于stack exchange，提问作者BSR