ST_X — Returns the X coordinate of a Point.
float ST_X(
geometry a_point)
;
Devuelve la coordenada X del punto, o NULL si no está disponible. La entrada debe ser un punto.
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To get the minimum and maximum X value of geometry coordinates use the functions ST_XMin and ST_XMax. |
This method implements the SQL/MM specification.
SQL-MM 3: 6.1.3
This function supports 3d and will not drop the z-index.