ST_velocityAtTime
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Returns the velocity attribute value of a trajectory object at a specified time point.
Syntax
float8 ST_VelocityAtTime (trajectory traj, timestamp t);Parameters
| Parameter | Description |
|---|---|
traj | The trajectory object. |
t | The time point to query. |
Return value
float8 — the velocity at the specified time point.
Example
Select ST_velocityAtTime(traj, '2010-1-11 23:40:00') From traj_table;Is this page helpful?