Question

我需要帮助....我不擅长SQL当我尝试应用JOIN时出现此错误：

[ Token line number = 1,Token line offset = 66,Token in error = JOIN ]

这是我的SQL：

var query = "SELECT Team.TeamName, Fixtures.HomeTeam" +
                "FROM Team" +
                "LEFT JOIN Fixtures" +
                "ON Team.TeamId=Fixtures.HomeTeam" +
                "ORDER BY Team.TeamName";

团队表有PK：TeamId 夹具表有FK：HomeTeam 我正在使用WebMatrix 2. Razor WebPages

Answer 1

行连接之间没有空格。更改每一行以包含最后的空格。

var query = "SELECT Team.TeamName, Fixtures.HomeTeam " +
            "FROM Team " +
            "LEFT JOIN Fixtures " +
            "ON Team.TeamId=Fixtures.HomeTeam " +
            "ORDER BY Team.TeamName";

Answer 2

正如Charles Brentana指出的那样，你错过了SQL命令中的空格。

也许更好的解决方案是使用逐字字符串文字，即在双引号字符之前用@字符创建的字符串，可以跨越多行：

var query = @"SELECT Team.TeamName, Fixtures.HomeTeam
                FROM Team
                LEFT JOIN Fixtures
                ON Team.TeamId=Fixtures.HomeTeam
                ORDER BY Team.TeamName";

Answer 3

你的字符串之间需要空格。

我通过将空格作为第一个字符来避免这种情况，所以当您忘记编码时，这一点非常明显：

var query = "SELECT Team.TeamName, Fixtures.HomeTeam" +
            " FROM Team" +
            " LEFT JOIN Fixtures" +
            " ON Team.TeamId=Fixtures.HomeTeam" +
            " ORDER BY Team.TeamName";

如果您始终以这种方式编码，您将能够立即发现任何丢失的空间。

解析查询时出错

3 个答案: