Sql 将表id从一列复制到表之间列数据匹配的另一列

我有两张桌子，水果和餐食，餐食中的一列是一个装有水果的varchar100。我正在改变这一点，以便 列是水果表中水果的id，我想通过比较两个表并获取id来设置它 从水果列匹配的水果表中

Table: Fruits   
id | fruit
1    apple
2    banana
3    orange

Table: Meals
id | Meal | Fruit
1    xxxx   apple
2    xxxx   apple
3    xxxx   orange
4    xxxx   banana
5    xxxx   orange
6    xxxx   orange
7    xxxx   apple

我尝试了以下脚本，但出现以下错误

Update product_attribute set control_caption =
(
    Select DISTINCT T1.control_caption_id from control_caption T1
    INNER Join product_attribute T2
    On T1.control_caption = T2.control_caption
    Where T1.control_caption = T2.control_caption
)

Subquery returned more than 1 value. This is not permitted when the subquery follows =, !=, <, <= , >, >= or when the subquery is used as an expression.

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取决于您的RDBMS，但这应该适用于SQL Server：

Update pa
set pa.control_caption = cc.control_caption_id 
From product_attribute pa
   Join control_caption cc On 
         cc.control_caption = pa.control_caption

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Update查询可以简化，并且可以使用联接代替运行select语句的子查询

Update P
    Set P.Control_Caption = C.Control_Caption_ID
    From Product_Attribute P
    join Control_Caption C on C.Control_Caption= P.Control_Caption

---

此脚本同时在SQL Server和Oracle上运行。

@MahmoudGamal这是一个MS SQL Server错误。是的，此脚本工作正常，很抱歉对水果和膳食造成混淆。