ST_YMax returns the maximum second coordinate of an input geometry.
Syntax
ST_YMax(geom)
Arguments
- geom
-
A value of data type
GEOMETRYor an expression that evaluates to aGEOMETRYtype.
Return type
DOUBLE PRECISION value of the maximum second coordinate.
If geom is empty, then null is returned.
If geom is null, then null is returned.
Examples
The following SQL returns the largest second coordinate of a linestring.
SELECT ST_YMax(ST_GeomFromText('LINESTRING(77.29 29.07,77.42 29.26,77.27 29.31,77.29 29.07)'));
st_ymax
-----------
29.31
