ST_MinX

Definition

ST_MinX takes a geometry as an input parameter and returns its minimum x-coordinate.

Syntax

Oracle and PostgreSQL

sde.st_minx (geometry1 sde.st_geometry)

SQLite

st_minx (geometry1 geometryblob)

Return type

Oracle and PostgreSQL

Number

SQLite

Double precision

Example

The table, minx_test, is created and two polygons inserted to it. ST_MinX is then run to determine the minimum x-coordinate value in each polygon.

Oracle

CREATE TABLE minx_test (
 id integer,
 geometry sde.st_geometry
);

INSERT INTO MINX_TEST VALUES (
 1901,
 sde.st_polygon ('polygon zm((110 120 20 3, 110 140 22 3, 120 130 26 4, 110 120 20 3))', 4326)
);

INSERT INTO MINX_TEST VALUES (
 1902,
 sde.st_polygon ('polygon zm((0 0 40 7, 0 4 35 9, 5 4 32 12, 5 0 31 5, 0 0 40 7))', 4326)
);

SELECT id, sde.st_minx (geometry) MinX
 FROM MINX_TEST;

        ID       MINX

      1901        110
      1902          0

PostgreSQL

CREATE TABLE minx_test (
 id integer,
 geometry sde.st_geometry
);

INSERT INTO minx_test VALUES (
 1901,
 sde.st_polygon ('polygon zm((110 120 20 3, 110 140 22 3, 120 130 26 4, 110 120 20 3))', 4326)
);

INSERT INTO minx_test VALUES (
 1902,
 sde.st_polygon ('polygon zm((0 0 40 7, 0 4 35 9, 5 4 32 12, 5 0 31 5, 0 0 40 7))', 4326)
);

SELECT id, sde.st_minx (geometry) 
 AS MinX
 FROM minx_test;

        id       minx

      1901        110
      1902          0

SQLite

CREATE TABLE minx_test (
 id integer
);

SELECT AddGeometryColumn (
 NULL,
 'minx_test',
 'geometry',
 4326,
 'polygonzm',
 'xyzm',
 'null'
);

INSERT INTO minx_test VALUES (
 1914,
 st_polygon ('polygon zm((110 120 20 3, 110 140 22 3, 120 130 26 4, 110 120 20 3))', 4326)
);

INSERT INTO minx_test VALUES (
 1915,
 st_polygon ('polygon zm((0 0 40 7, 0 4 35 9, 5 4 32 12, 5 0 31 5, 0 0 40 7))', 4326)
);

SELECT id AS "ID", st_minx (geometry) AS "MinX"
 FROM minx_test;

ID       MinX

1914     110.0
1915       0.0