Question

OleDbConnection connection = new OleDbConnection(@"Provider = Microsoft.ACE.OLEDB.12.0; Data Source = E:\Computing\WindowsFormsApplication1\WindowsFormsApplication1\bin\Debug\Database31.accdb");
        connection.Open();
        OleDbCommand command = new OleDbCommand("SELECT Cocktails.CID, Ingredients.Ingredient1" +
            " FROM Cocktails INNER JOIN Ingredients" +
            " ON Cocktails.ID = Ingredients.ID" +
            " WHERE Cocktails.ID = 1",
        connection);

        OleDbDataReader reader = command.ExecuteReader();
        if (reader.Read())
        {
            string result = reader.GetValue(0).ToString();
            string result2 = reader.GetValue(1).ToString();
            MessageBox.Show(result + result2);
        }
        connection.Close();

我是SQL的新手并尝试使用“内连接”从两个不同的表中提取信息，：'JOIN操作中的语法错误'。是我得到的错误，不确定为什么。感谢

Answer 1

鸡尾酒和配料必须是鸡尾酒和配料，就像你在FROM ... INNTER JOIN系列中有它们一样

Answer 2

您指定的表名是错误的。

ON Cocktails.ID = Ingredients.ID

SQL内部联接错误 - SQL新手

2 个答案: