ST_MaxX

定義

ST_MaxX は、ジオメトリを入力パラメータとして、その最大 X 座標を返します。

構文

Oracle および PostgreSQL

sde.st_maxx (geometry1 sde.st_geometry)

SQLite

st_maxx (geometry1 geometryblob)

戻り値のタイプ

Oracle および PostgreSQL

Number

SQLite

Double precision

例

maxx_test テーブルを作成し、2 つのポリゴンを挿入します。次に、ST_MaxX 関数を使用して、各ポリゴンの最大 X 値を判定します。

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))', 4326)
);
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))', 4326)
);
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))', 4326)
);
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))', 4326)
);
SELECT id, sde.st_maxx (geometry)
 AS Max_X
 FROM maxx_test;
        id      max_x
      1901        120
      1902          5

SQLite

CREATE TABLE maxx_test (
 id integer
);
SELECT AddGeometryColumn (
 NULL,
 'maxx_test',
 'geometry',
 4326,
 'polygonzm',
 'xyzm',
 'null'
);
INSERT INTO maxx_test VALUES (
 1901,
 st_polygon ('polygon zm((110 120 20 3, 110 140 22 3, 120 130 26 4, 110 120 20 3))', 4326)
);
INSERT INTO maxx_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))', 4326)
);
SELECT id, st_maxx (geometry)
 AS "max_x"
 FROM maxx_test;
id      max_x
1901    120.0
1902    5.00000000