ST_MinX

定义

ST_MinX 以几何对象为输入参数，返回其最小 x 坐标。

语法

sde.st_minx (g1 sde.st_geometry)

返回类型

数值

示例

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))', 0)
);

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))', 0)
);

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))', 0)
);

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))', 0)
);

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

        id       minx

      1901        110
      1902          0