```sql
declare @dt datetime --时间
declare @gpsindex numeric(18,2) --GPSIndex
declare @rand float --随机数
declare @count int --计数
```
--declare @GPSINDEX1 bigint
```sql
declare @adatetime1 datetime
declare @endDate datetime; --结束时间
declare @X1 float
declare @Y1 float
declare @H1 float
declare @DX1 float
declare @DY1 float
declare @DH1 float
declare @X0 float
declare @Y0 float
declare @H0 float

set @dt = '2020-1-17 12:30:00.000';
set @endDate= '2020-5-18 18:00:00.000';
select top 1 @X1 = X,@Y1 = Y,@H1 = Height,@DX1=dltaX,@DY1=dltaY,@DH1=dltaH from DC_GB09_STC where aDatetime < @dt order by aDatetime desc
```
--求出基准坐标
```sql
set @X0=@X1-@DX1
set @Y0=@Y1-@DY1
set @H0=@H1-@DH1
select @X0,@Y0,@H0
```
while(@dt < @endDate) begin

```sql
set @gpsindex = convert(bigint, datediff(ss, '1970-01-01 00:00:00', @dt))*1000 + datepart(ms,@dt)
SET @DX1 = RAND()*8-8/2;
SET @DY1 = RAND()*8-8/2;
SET @DH1 = RAND()*10-10/2;
SET @X1 = @X0+ @DX1/1000
SET @Y1 = @Y0+ @DY1/1000
SET @H1 = @H1+ @DH1/1000
SET @adatetime1 = DATEADD(S,@gpsindex/1000,'1970-01-01 00:00:00')
BEGIN TRY insert into DC_GB09_STC([GPSIndex],[aDatetime],[X],[Y],[Height],[dltaX],[dltaY],[dltaH])VALUES(@gpsindex,@adatetime1,@X1,@Y1,@H1,@DX1,@DY1,@DH1)
END TRY BEGIN
```
CATCH END CATCH
--****************
```sql
set @count = @count + 1
set @dt = DATEADD(MINUTE,30,@dt) --每次递增5min
```
end