SQL查询错误

Question

我试图在 Visual Studio asp.net 中运行 SQL 查询，但出现此错误：

您的 SQL 语法有错误；检查手册 对应于您的 MySQL 服务器版本，以便使用正确的语法 '' AND JobID = jn.ID GROUP BY JOBID)) 附近，如已交付， ' 在第 1 行

但我看不出问题出在哪里。

private static string SearchSQL
{
    get{
        return @" set @sql = null;
            select
                group_concat(distinct
                    concat(
                        'max(case when PieceType = ''',
                        PieceType,
                        ''' then AdvisedQty end) AS ',
                        concat(PieceType)
                    )
                )into @sql
            FROM customer c
            LEFT JOIN job_address ja ON c.AccountCode = ja.Code AND c.Company_ID = ja.Company_ID
            JOIN  AddressType jat ON ja.AddressType = jat.ID and jat.Description = ''Debtor''
            LEFT JOIN job_new jn ON ja.JobID = jn.ID
            LEFT JOIN job_pieces jp ON ja.JobID = jp.ID

    WHERE c.Company_ID = ?compid;

    set @sql = concat('select 
                c.Name,
                COUNT(distinct jn.ID) as Jobs,
                SUM((select COUNT(ID) from jobstat where Status = ''DEL'' AND JobID = jn.ID GROUP BY JOBID)) as Delivered,
                SUM((select COUNT(ID) from jobstat where Status = ''POD'' AND JobID = jn.ID GROUP BY JobID)) as POD,
                (select COUNT(job_debriefs.ID) from job_debriefs WHERE JobID = jn.JobNo) as Debriefs,
                sum(jn.OutTurn) as Outturn,
                SUM(jn.ActualWeight) as GrossWt,
                SUM(jn.CBM) as CBM,
                jn.Department,
                (SELECT Name FROM job_address WHERE AddressType =3 AND JobID = jn.ID) as CollectName,
                (SELECT Name FROM job_address WHERE AddressType =2 AND JobID = jn.ID) as DeliverName,
                ', @sql, ' 
            FROM customer c
            LEFT JOIN job_address ja ON c.AccountCode = ja.Code AND c.Company_ID = ja.Company_ID
            JOIN  AddressType jat ON ja.AddressType = jat.ID and jat.Description = ''Debtor''
            LEFT JOIN job_new jn ON ja.JobID = jn.ID
            LEFT JOIN job_pieces jp ON ja.JobID = jp.ID

    WHERE c.Company_ID = ?compid
    GROUP BY c.ID');

    prepare stmt from @sql;
    execute stmt;
    deallocate prepare stmt;
                            ";
        }
    }

好的，我修复了单引号，但现在出现的错误是：

您的 SQL 语法有错误；检查手册 对应于您的 MySQL 服务器版本，以便使用正确的语法 靠近'?compid GROUP BY c.ID' 在第 19 行

它正在寻找 compid，所以这不是问题

Answer 1

您仍然在此处的字符串文字中，因此您需要将单引号加倍以在错误消息中摘录之前的 DEL 值上转义它们：

SUM((select COUNT(ID) from jobstat where Status = ''DEL'' AND JobID = jn.ID GROUP BY JOBID)) as Delivered,
SUM((select COUNT(ID) from jobstat where Status = ''POD'' AND JobID = jn.ID GROUP BY JobID)) as POD,