ST_PointZ — Creates a Point with X, Y, Z and SRID values.
geometry ST_PointZ(float x, float y, float z, integer srid=unknown);
Returns an Point with the given X, Y and Z coordinate values, and optionally an SRID number.
Enhanced: 3.2.0 srid as an extra optional argument was added. Older installs require combining with ST_SetSRID to mark the srid on the geometry.
SELECT ST_PointZ(-71.104, 42.315, 3.4, 4326)
SELECT ST_PointZ(-71.104, 42.315, 3.4, srid => 4326)
SELECT ST_PointZ(-71.104, 42.315, 3.4)