Remove trailing zeros in decimal value with changing length

Question

I have a procedure I am doing that displays odds but the client wants only significant digits to be shown. So, 1.50 would show as \'1.5\' and 1.00 would show as \'1\'.

Answer 1

I had a similar problem in a situation where I could not modify the code nor the SQL query, but I was allowed to modify the database structure. So I changed the column format from DECIMAL to FLOAT and it solved my problem.

Answer 2

Please use below function , it will take care of number having zero without decimal places i.e 150 etc....

 SET @saved_cs_client     = @@character_set_client;
 SET character_set_client = utf8;
 DELIMITER $$
 USE `mydbname`$$

 DROP FUNCTION IF EXISTS `FN_STRIP_TRAILING_ZER0`$$

 CREATE DEFINER=`mydbuser`@`%` FUNCTION `FN_STRIP_TRAILING_ZER0`(tNumber DECIMAL(10,7)) RETURNS VARCHAR(20) CHARSET utf8

 BEGIN
     DECLARE strBuff VARCHAR(20);
     DECLARE cnt  NUMERIC(2);
     DECLARE tString VARCHAR(20);
     SELECT CAST(tNumber AS CHAR) INTO tString;
     SELECT LOCATE('.',tString) INTO cnt;
     IF cnt > 0 THEN
       SELECT TRIM(TRAILING '.' FROM TRIM(TRAILING '0' FROM tString)) INTO strBuff;   
     ELSE
       SET strBuff = tString;
     END IF;
     RETURN strBuff;
 END$$
 DELIMITER ;
 SET character_set_client = @saved_cs_client;

Addendum:

Typically to call this would involve: SELECT FN_STRIP_TRAILING_ZER0(1.5);

Answer 3

SELECT TRIM(TRAILING '.' FROM TRIM(TRAILING '0' from yourfield)) AS yourfield
FROM yourtable
WHERE yourfield LIKE '%.%'

or

SELECT TRIM(TRAILING '.' FROM TRIM(TRAILING '0' from yourfield)) AS yourfield
FROM yourtable
WHERE instr(yourfield,'.') != 0

work ok but require a "where" clause.

I think the best solution is probably:

SELECT TRIM(TRAILING '.' FROM TRIM(TRAILING '0' FROM ROUND(yourfield,3))) 
FROM yourtable

as it doesn't require a "where" clause, doesn't require any special code, and also lets you set the maximum precision of the number upfront.