float postgres
CREATE TABLE float_point (floatn FLOAT4); -- precision min 4, maximum 8
INSERT INTO float_point (floatn) VALUES (543.23); -- 543,23
CREATE TABLE float_point_r (real_no REAL); -- 1E-37 to 1E+37, 6 decimal max
INSERT INTO float_point_r (real_no) VALUES (12345623); -- 1,234562€+07