ST_X
The function ST_X takes a point as an input parameter and returns its X coordinate.
If the given point is null or is empty, then null is returned.
Syntax
Parameters
- point
- A value of type ST_Point for which the X coordinate is returned or modified.
Return types
DOUBLE
Examples
Example 1
This example
illustrates use of the ST_X function. Geometries are created and inserted
into the SAMPLE_POINTS table.
SET CURRENT PATH = CURRENT PATH, db2gse;
CREATE TABLE sample_points (id INTEGER, geometry ST_Point);
INSERT INTO sample_points (id, geometry)
VALUES (1, ST_Point (2, 3, 32, 5, 1) );
INSERT INTO sample_points (id, geometry)
VALUES (2, ST_Point (4, 5, 20, 4, 1) );
INSERT INTO sample_points (id, geometry)
VALUES (3, ST_Point (3, 8, 23, 7, 1) );
Example 2
This example finds the X
coordinates of the points in the table.
SELECT id, ST_X (geometry) X_COORD
FROM sample_points;
ID X_COORD
---------- ----------------------
1 +2.00000000000000E+000
2 +4.00000000000000E+000
3 +3.00000000000000E+000