定义
ST_MinY 以几何对象为输入参数,返回其最小 y 坐标。
语法
Oracle 和 PostgreSQL
sde.st_miny (geometry1 sde.st_geometry)
SQLite
st_miny (geometry1 geometryblob)
返回类型
Oracle 和 PostgreSQL
数值
SQLite
双精度型
示例
创建表 miny_test,并向其中插入两个面。然后运行 ST_MinY,以确定每个面的最小 y 坐标值。
PostgreSQL
Oracle
CREATE TABLE miny_test (
id integer,
geometry sde.st_geometry
);
INSERT INTO MINY_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 MINY_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_miny (geometry) MinY
FROM MINY_TEST;
ID MINY
1901 120
1902 0
PostgreSQL
CREATE TABLE miny_test (
id integer,
geometry sde.st_geometry
);
INSERT INTO miny_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 miny_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_miny (geometry)
AS MinY
FROM miny_test;
id miny
1901 120
1902 0
SQLite
CREATE TABLE miny_test (
id integer
);
SELECT AddGeometryColumn (
NULL,
'miny_test',
'geometry',
4326,
'polygonzm',
'xyzm',
'null'
);
INSERT INTO miny_test VALUES (
101,
st_polygon ('polygon zm((110 120 20 3, 110 140 22 3, 120 130 26 4, 110 120 20 3))', 4326)
);
INSERT INTO miny_test VALUES (
102,
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, st_miny (geometry)
AS "MinY"
FROM miny_test;
id MinY
101 120.0
102 0.0