ST_MaxY
定义
ST_MaxY 以几何对象为输入参数,返回其最大 y 坐标。
语法
sde.st_maxy (g1 sde.st_geometry)
返回类型
数值
示例
Oracle
CREATE TABLE maxy_test (id integer, geometry sde.st_geometry); INSERT INTO MAXY_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 MAXY_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_maxy (geometry) Max_Y FROM MAXY_TEST; ID MAX_Y 1901 140 1902 4
PostgreSQL
CREATE TABLE maxy_test (id integer, geometry sde.st_geometry); INSERT INTO maxy_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 maxy_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_maxy (geometry) AS Max_Y FROM maxy_test; ID MAX_Y 1901 140 1902 4
3/7/2012