下面这段伪代码,当显示第一页的时候正常,但是第二页开始就会报错了,错误是:
org.hibernate.exception.SQLGrammarException: could not extract ResultSet
Caused by: com.microsoft.sqlserver.jdbc.SQLServerException: 除非另外还指定了 TOP、OFFSET 或 FOR XML,否则,ORDER BY 子句在视图、内联函数、派生表、子查询和公用表表达式中无效。
String sql="select sd.sensorInputDataID as 数据ID,e.equipmentName as 设备名,sd.date as 日期 "+
"from SensorInputData as sd left join Sensor as s on sd.sensorId=s.sensorId left join EquipmentMessage as e on s.equipmentId=e.equipmentId "+
"where sd.date between '2015/08/13 00:00:00' and '2015/08/13 23:59:59' and e.equipmentName like'%设备5%' union "+
"select sd.sensorInputDataID as 数据ID,e.equipmentName as 设备名,sd.date as 日期 "+
"from SensorInputData as sd left join Sensor as s on sd.sensorId=s.sensorId left join EquipmentMessage as e on s.equipmentId=e.equipmentId "+
"where sd.date between '2015/08/13 00:00:00' and '2015/08/13 23:59:59' and e.area like'%设备5%' order by sd.date asc";
session.createSQLQuery(sql).setFirstResult((pageNow-1)*pageSize).setMaxResults(pageSizeInt).list();
这个需求有个问题:
先解决你的问题,sql1 union sql2 order by xx
没有意义,除非是(sql1 union sql2) order by xx
,你想想
join合并查询,还有Union联合查询,这种sql怎么优化,cost都不会太低,对这个,你还要分页!!建议重构逻辑,生成结果表,在页面里简单分页查询。
http://bbs.csdn.net/topics/350026164
用存储过程分页试试,换种思路