ST_MinZ takes a geometry as an input parameter and returns its minimum z-coordinate.
Oracle
sde.st_minz (g1 sde.st_geometry)
PostgreSQL
st_minz (g1 st_geometry)
Oracle
CREATE TABLE minz_test (id integer, geometry sde.st_geometry);
INSERT INTO minz_test VALUES (
1901,
sde.st_polygon ('polygon zm((110 120 20 3, 110 140 22 3, 120 130 26 4, 110 120 20 3))', 0)
);
INSERT INTO minz_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))', 0)
);
SELECT id, sde.st_minz (geometry) MinZ
FROM minz_test;
ID MINZ
1901 20
1902 31
PostgreSQL
CREATE TABLE minz_test (id integer, geometry st_geometry);
INSERT INTO minz_test VALUES (
1901,
st_polygon ('polygon zm((110 120 20 3, 110 140 22 3, 120 130 26 4, 110 120 20 3))', 0)
);
INSERT INTO minz_test VALUES (
1902,
st_polygon ('polygon zm((0 0 40 7, 0 4 35 9, 5 4 32 12, 5 0 31 5, 0 0 40 7))', 0)
);
SELECT id, st_minz (geometry) AS MinZ
FROM minz_test;
id minz
1901 20
1902 31
