# ST_PointFromWKB

## Definition

ST_PointFromWKB takes a well-known binary (WKB) representation and a spatial reference ID to return an ST_Point.

## Syntax

**Oracle**

sde.st_pointfromwkb (wkb blob, srid integer)

**PostgreSQL**

sde.st_pointfromwkb (wkb bytea, srid integer)

## Return type

ST_Point

## Example

This example illustrates how ST_PointFromWKB can be used to create a point from its well-known binary representation. The geometries are points in spatial reference system 1. In this example, the points are stored in the geometry column of the sample_points table, then the wkb column is updated with their well-known binary representations (using the ST_AsBinary function). Finally, the ST_PointFromWKB function is used to return the points from the WKB column. The sample-points table has a geometry column, where the points are stored, and a wkb column, where the points' well-known binary representations are stored.

**Oracle**

CREATE TABLE sample_points (id integer, geometry sde.st_point, wkb blob); INSERT INTO SAMPLE_POINTS (id, geometry) VALUES ( 10, sde.st_point ('point (44 14)', 0) ); INSERT INTO SAMPLE_POINTS (id, geometry) VALUES ( 11, sde.st_point ('point (24 13)', 0) ); UPDATE SAMPLE_POINTS SET wkb = sde.st_asbinary (geometry) WHERE id = 10; UPDATE SAMPLE_POINTS SET wkb = sde.st_asbinary (geometry) WHERE id = 11;

**PostgreSQL**

CREATE TABLE sample_points (id integer, geometry sde.st_point, wkb bytea); INSERT INTO sample_points (id, geometry) VALUES ( 10, sde.st_point ('point (44 14)', 0) ); INSERT INTO sample_points (id, geometry) VALUES ( 11, sde.st_point ('point (24 13)', 0) ); UPDATE sample_points SET wkb = sde.st_asbinary (geometry) WHERE id = 10; UPDATE sample_points SET wkb = sde.st_asbinary (geometry) WHERE id = 11;

In the following SELECT statement, the ST_PointFromWKB function is used to retrieve the points from the WKB column.

**Oracle**

SELECT id, sde.st_astext (sde.st_pointfromwkb(wkb, 0)) POINTS FROM SAMPLE_POINTS; ID POINTS 10 POINT (44.00000000 14.00000000) 11 POINT (24.00000000 13.00000000)

**PostgreSQL**

SELECT id, sde.st_astext (sde.st_pointfromwkb(wkb, 0)) AS points FROM sample_points; id points 10 POINT (44 14) 11 POINT (24 13)