Question

希望有人可以提供帮助，我继续使用以下sql语句获取不正确的“WHERE”语法

using (SqlCommand selectT = new SqlCommand("Select [TR_RegNumber] 
                                            FROM dbo.TrailerDetail 
                                            WHERE [TR_Routes] = '" +trailersRoutesAllocations[i]+ "'" + " 
                                            AND WHERE [TR_Classficiation] = '" +trailersVragClassification[i]+ "'", con))

我在C＃中编码（使用Visual Studio）

Answer 1

你还有一个。只写一个像这里的地方：

SELECT column1, column2, ...
FROM table_name
WHERE condition1 AND condition2 AND condition3 ...;

这是https://www.w3schools.com/sql/sql_and_or.asp

的副本

Answer 2

删除AND条件中的额外位置，它应该有效。

using (SqlCommand selectT = new SqlCommand("Select [TR_RegNumber] 
                                        FROM dbo.TrailerDetail 
                                        WHERE [TR_Routes] = '" +trailersRoutesAllocations[i]+ "'" + " 
                                        AND [TR_Classficiation] = '" +trailersVragClassification

使用我的sql语句获取不正确的WHERE语法

2 个答案: