ST_MaxX

定义

ST_MaxX 以几何对象为输入参数，返回其最大 x 坐标。

语法

sde.st_maxx (g1 sde.st_geometry)

返回类型

数值

示例

Oracle

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

INSERT INTO MAXX_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 MAXX_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_maxx (geometry) Max_X
FROM MAXX_TEST;

        ID      MAX_X

      1901        120
      1902          5

PostgreSQL

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

INSERT INTO maxx_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 maxx_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_maxx (geometry)
AS Max_X
FROM maxx_test;

        id      max_x

      1901        120
      1902          5