Add Procedure and Prepare Statement
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@@ -382,5 +382,11 @@ SELECT product_id
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② 为什么说窗口函数只能在SELECT子句中使用?实际上,在ORDER BY 子句使用系统并不会报错。
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## **5.4**
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创建20个与 `shop.product` 表结构相同的表,如下图所示:
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# 
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