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

Source: educba.com

Postgresql float data type

ALTER TABLE tableName 
ADD COLUMN columnName float(4);

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