ST_MinX

定義

ST_MinX は、ジオメトリを入力パラメーターとして、その最小 X 座標を返します。

構文

Oracle および PostgreSQL

sde.st_minx (geometry1 sde.st_geometry)

SQLite

st_minx (geometry1 geometryblob)

戻り値のタイプ

Oracle および PostgreSQL

Number

SQLite

Double precision

例

minx_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_MinX が実行して、各ポリゴンの最小 X 座標値を判定します。

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))', 4326)
);
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))', 4326)
);
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))', 4326)
);
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))', 4326)
);
SELECT id, sde.st_minx (geometry) 
 AS MinX
 FROM minx_test;
        id       minx
      1901        110
      1902          0

SQLite

CREATE TABLE minx_test (
 id integer
);
SELECT AddGeometryColumn (
 NULL,
 'minx_test',
 'geometry',
 4326,
 'polygonzm',
 'xyzm',
 'null'
);
INSERT INTO minx_test VALUES (
 1914,
 st_polygon ('polygon zm((110 120 20 3, 110 140 22 3, 120 130 26 4, 110 120 20 3))', 4326)
);
INSERT INTO minx_test VALUES (
 1915,
 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 AS "ID", st_minx (geometry) AS "MinX"
 FROM minx_test;
ID       MinX
1914     110.0
1915       0.0