Question

我尝试在MS服务器管理工作室中运行以下脚本，这非常正常。

SELECT ucb.UserFirstName, ucb.UserLastName, ucb.userid, c.caseid
FROM Cases c 
    LEFT JOIN Users ucb ON (c.ConfirmedBy=ucb.UserID) 
    JOIN RealtorStaff rs ON c.realtorstaffid=rs.realtorstaffid 
WHERE c.ConfirmedBy is not null AND c.CaseStatusID <> 7 
    AND (
            SELECT COUNT(ServiceID) 
            FROM Cases ca JOIN Services s ON ca.CaseID=s.CaseID 
            WHERE ca.CaseID=c.CaseID 
                AND s.ServiceTypeID != 8 
                AND s.ServiceTypeID != 9 
                AND s.ServiceTypeID != 10 
                AND s.ServiceTypeID != 14 
                AND s.ServiceTypeID != 15 
                AND s.ServiceStatusID != 7)>0 
    AND c.DateConfirmed >= '2010-08-06 00:00:00' 
    AND c.DateConfirmed <= '2010-08-06 23:59:59' 
ORDER BY ucb.UserFirstName, ucb.UserLastName, c.caseid

在我尝试将其转换为以下脚本之后不知何故，以便我可以在sp_executesql和错误消息显示下运行它（消息102，级别15，状态1，行11 '8'附近的语法不正确。

--  /* for testing purpose
    Declare @startdate DATETIME; set @startdate = '2010-08-06'
    Declare @enddate DATETIME; set @enddate = '2010-08-06'
--  */

    Declare @actualstartdate varchar(20); set @actualstartdate = replace(convert(char(26),@startdate,102),'.','-')+' 00:00:00'
    Declare @actualenddate varchar(20); set @actualenddate = replace(convert(char(26),@enddate,102),'.','-')+' 23:59:58'

    DECLARE @SQL nvarchar(500)

    SET @SQL = 'SELECT ucb.UserFirstName, ucb.UserLastName, ucb.userid, c.caseid
                 INTO ##actual_assigned_cases
                 FROM Cases c 
                    LEFT JOIN Users ucb ON (c.ConfirmedBy=ucb.UserID) 
                    JOIN RealtorStaff rs ON c.realtorstaffid=rs.realtorstaffid 
                 WHERE c.ConfirmedBy is not null '

    SET @SQL = @SQL+' AND c.CaseStatusID <> 7 
                AND (SELECT COUNT(ServiceID) 
                FROM Cases ca 
                    JOIN Services s ON ca.CaseID=s.CaseID 
                WHERE ca.CaseID=c.CaseID 
                AND s.ServiceTypeID != 8
                AND s.ServiceTypeID != 9
                AND s.ServiceTypeID != 10 
                AND s.ServiceTypeID != 14
                AND s.ServiceTypeID != 15 
                AND s.ServiceStatusID != 7) > 0'


    SET @SQL = @SQL+' AND c.DateConfirmed >= '''+@actualstartdate+''' 
                AND c.DateConfirmed <= '''+@actualenddate+'''
                ORDER BY ucb.UserFirstName, ucb.UserLastName, c.caseid'

    EXECUTE sp_executesql @SQL

有谁知道这里发生了什么？以及如何解决这个问题？

Answer 1

做一个print @sql AKA the poor man's debugger并且问题将会显露出来，我的猜测是nvarchar（500）还不够......等于2000

另请查看Changing exec to sp_executesql doesn't provide any benefit if you are not using parameters correctly以了解如何使用参数以便可以重复使用执行计划

Answer 2

您是否尝试过打印@SQL以查看变量内部的内容？

拿走你所拥有的东西并打印出来，我明白了：

SELECT ucb.UserFirstName, ucb.UserLastName, ucb.userid, c.caseid
                 INTO ##actual_assigned_cases
                 FROM Cases c 
                    LEFT JOIN Users ucb ON (c.ConfirmedBy=ucb.UserID) 
                    JOIN RealtorStaff rs ON c.realtorstaffid=rs.realtorstaffid 
                 WHERE c.ConfirmedBy is not null  AND c.CaseStatusID <> 7 
                AND (SELECT COUNT(ServiceID) 
                FROM Cases ca 
                    JOIN Services s ON ca.CaseI

看起来你的@SQL变量不够大 - 试试nvarchar（max）。

Answer 3

您有超过500个字符，因此@SQL被截断改为：

  DECLARE @SQL nvarchar(4000)

在sp_executesql期间找到不正确的语法

3 个答案: