例: ST_GeometryN - Teradata Database - Teradata Vantage NewSQL Engine

CREATE TABLE sample_shapes (skey INTEGER, shape ST_Geometry);

INSERT INTO sample_shapes VALUES 
(1001,'MultiPoint((10 20 30),(40 50 60),(70 80 90))');

INSERT INTO sample_shapes VALUES 
(1002, 'MultiLineString((10 20 30,10 20 50,10 20 70,10 20 90),
(5 5 5,10 10 10,15 15 15,20 20 20,25 25 25,30 30 30))');

INSERT INTO sample_shapes VALUES
(1003,'MultiPolygon(((0 0 0,0 20 20,20 20 20,20 0 20,0 0 0)),
((50 50 50,50 90 90,90 90 90,90 50 90,50 50 50)))');

INSERT INTO sample_shapes VALUES
(1004,'Geometrycollection(Point(10 20 30),Linestring(1 2 3,4 5 6,7 8 9), 
Polygon((0 0 0,0 40 40,40 40 40,40 0 40,0 0 0)))');

SELECT shape.ST_GeometryN(2)
FROM sample_shapes
WHERE skey = 1001;