Question

为什么此查询不起作用？

Delete  tblProduct
From    tblProduct
Inner Join @unwantedRows
On tblProduct.ProductId = @unwantedRows.ProductId;

@unwantedRows

的位置

DECLARE @unwantedRows TABLE 
( 
    ProductId INT, 
    ProductName VARCHAR(50),
    Description VARCHAR(50),
    Category VARCHAR(50),
    Repetitions int

);

Answer 1

您不能在连接中使用变量名称。

尝试：

Delete  tblProduct
From    tblProduct
Inner Join @unwantedRows AS u
On tblProduct.ProductId = u.ProductId;

Answer 2

试试这个

Delete  tblProduct
From    tblProduct
WHERE tblProduct.ProductId IN (SELECT ProductId FROM @unwantedRows);

必须声明标量变量“@unwantedRows”

2 个答案: