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数据库/模拟一段数据.md

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+```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 = '2018-10-23 03:08:00.000';
+set @endDate= '2018-11-20 18:19:00.000';
+select @X1 = X,@Y1 = Y,@H1 = Height,@DX1=dltaX,@DY1=dltaY,@DH1=dltaH from MYB1_RTK where aDatetime = @dt
+```
+--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()*-10 + 10)/2000
+SET @DY1 = (rand()*-10 + 9)/2000
+SET @DH1 =(rand()*-10 + 8)/2000
+SET @X1 = @X0+ @DX1
+SET @Y1 = @Y0+ @DY1
+SET @H1 = @H1+ @DH1
+SET @adatetime1 = DATEADD(S,@gpsindex/1000,'1970-01-01 00:00:00')
+BEGIN TRY insert into HiMonitorDb.[dbo].MYB1_RTK([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,5,@dt) --每次递增5min
+```
+end