小编hab*_*eb 的帖子

我有一个查询,它由多个查询和多个表连接,如果我运行此查询我收到如下错误:

1. 除非使用IS NULL或LIKE运算符,否则无法比较或排序text,ntext和image数据类型.
2. ntext数据类型不能被选为DISTINCT,因为它不具有可比性.

表结构是: 表和数据类型的设计

并且查询是这样的:

SELECT p.Proj_uid, p.proj_name,p.Agency,p.District,p.Division,p.ProjStatus,Civilbill80.billcount as Civilbill80, 
Civilbill20.billcount as Civilbill20 ,Civilbillpay.billcount as FinalCivilBill,CivilWorkslip.billcount as CivilWorkslip,
 Electribill80.billcount as Electricbill80, Electribill20.billcount as Electricbill20, Electribillpay.billcount as FinalElectriBill,
 ElectriWorkslip.billcount as ElectriWorkslip  FROM tempproj p
  LEFT JOIN (
             SELECT distinct(Proj_name),BillType,COUNT(1) as billcount  FROM payment_80   where BillType='CIVIL'
              GROUP BY Proj_name, BillType ) Civilbill80 ON Civilbill80.Proj_name = p.proj_name 
 LEFT JOIN (
             SELECT distinct(Proj_name),billtype,COUNT(1) as billcount FROM Payment_20    where billtype='CIVIL'
              GROUP BY Proj_name, billtype ) Civilbill20 ON Civilbill20.Proj_name = p.proj_name 
 LEFT JOIN ( …