/****** Script for SelectTopNRows command from SSMS ******/

```sql
declare @bx float
declare @by float
declare @bh float
select @bx=a.BaseX,@by=a.BaseY,@bh=a.BaseH from DataSyncPushConnector.dbo.DataSyncStation a
join [HiMonitorDB].[dbo].DeviceInfo b
```
on a.DeviceName=b.DeviceName
```sql
where a.DeviceName='WZ0504'

SELECT [GPSIndex]
```
,[aDatetime]
,[X]
,[Y]
,[Height]
,([X]-@bx)*1000 as dx
,([Y]-@by)*1000 as dy
,([Height]-@bh)*1000 as dh
```sql
FROM [HiMonitorDB].[dbo].[wz0504_stc] a   where aDatetime >'2020-04-1'
```
order by aDatetime desc