c# - “/”应用程序中的服务器错误。在C#.net

我正在C＃.Net中传递MYSQL查询，并且总是遇到相同的错误。

我的查询是

    topCustomers.DataSource = GetData("SELECT l.Username , Sum( ad.Amt ) AS Amount ,ad.UserDate FROM adm_advt_answer ad" +
                              "JOIN adm_advt_question adq ON ad.Q_ID = adq.nID" +
                              " INNERJOIN login l ON adq.Buserid = l.Buserid WHERE adq.Buserid = '" + username + "' AND adq.Active='Y' AND date( ad.UserDate ) = '2014-02-20'" +
                              " GROUP BY UserId");
    topCustomers.DataBind();

请更正我的语法。

我的错误是

您的SQL语法有误；查看与您的MySQL服务器版本相对应的手册，以获取正确的语法，以在“ adm_advt_question adq ON ad.Q_ID = adq.nID INNERJOIN登录l ON adq.Buserid = l”附近使用。在第1行

最佳答案

尝试使用INNER JOIN代替INNERJOIN。

topCustomers.DataSource = GetData("SELECT l.Username , Sum( ad.Amt ) AS Amount
,ad.UserDate FROM adm_advt_answer ad " +//Notice the space at ending
"JOIN adm_advt_question adq ON ad.Q_ID = adq.nID" +
" INNER JOIN login l ON adq.Buserid = l.Buserid WHERE adq.Buserid = '" + username + "' AND
adq.Active='Y' AND date( ad.UserDate ) = '2014-02-20'" +
" GROUP BY UserId");

您应该考虑使用PreparedStatements来避免sql injection。（对于参数username）