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