随着长度的变化删除十进制值中的尾随零

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'.

How can I get MySQL to not display trailing zeros;

ie in the database:

Odds
1.500
23.030
2.000
4.450

would display as

1.5
23.03
2
4.45

Thanks for any help

Answer 1

Easiest way by far, just add zero!

Examples:

SET 
    @yournumber1="1.500", 
    @yournumber2="23.030",
    @yournumber3="2.000",
    @yournumber4="4.450"
;

SELECT 
    (@yournumber1+0),
    (@yournumber2+0),
    (@yournumber3+0),
    (@yournumber4+0)
;

+------------------+------------------+------------------+------------------+
| (@yournumber1+0) | (@yournumber2+0) | (@yournumber3+0) | (@yournumber4+0) |
+------------------+------------------+------------------+------------------+
|              1.5 |            23.03 |                2 |             4.45 |
+------------------+------------------+------------------+------------------+
1 row in set (0.00 sec)

If the column your value comes from is DECIMAL or NUMERIC type, then cast it to string first to make sure the conversion takes place...ex:

SELECT (CAST(`column_name` AS CHAR)+0) FROM `table_name`;

For a shorter way, just use any built-in string function to do the cast:

SELECT TRIM(`column_name`)+0 FROM `table_name`;

Answer 2

EDIT : I would use the answer below by Christopher McGowan instead - adding 0 to the value, which is better, instead.

---

It's important to check there is actually a decimal point if doing trimming.

So I think you'd want to use:

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

Answer 3

this worked for me.. round the field to 2 decimal places and then trim any trailing zeros

So that 2.10 is 2.1

SELECT trim(round(FIELDNAME,2))+0 
FROM tbl_name
....

Answer 4

To remove trailing zeros from a DECIMAL / NUMERIC or string type column, you can simply cast the value to DOUBLE , eg:

SELECT CAST(mycol AS DOUBLE) from mytable;

or

SELECT mycol + 0E0 FROM mytable;

In fact, the "cast to char and add zero" trick mentioned in other answers does the same, but in a more indirect (and likely less efficient) way, eg:

SELECT CAST(mycol AS CHAR)+0 FROM mytable; -- converts to string, then to number
SELECT TRIM(mycol)+0 FROM mytable; -- ditto

Answer 5

Please use below function , it will take care of number having zero without decimal places ie 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 6

我发现的最佳解决方案是将您的回合值转换为 FLOAT：

SELECT CAST(ROUND(1.2345984372, 2) AS FLOAT)

Answer 7

Here's what worked for me:

SINGLE COLUMN:

SELECT TRIM(column_name)+0 AS column_name FROM table_name;

MULTIPLE COLUMNS:

SELECT 
TRIM(column1)+0 AS column1,
TRIM(column2)+0 AS column2,   
TRIM(column3)+0 AS column3,
FROM table_name;

Answer 8

Taking forward the answer provided by @fooquency, if the column is already declared as a DECIMAL with a non-zero value for D in DECIMAL(M, D), we do not need to perform the WHERE condition

WHERE yourfield LIKE '%.%'

as the values in the column will always contain D digits after the decimal dot (.)

Answer 9

Try this simply updated Query to remove decimal zeros

SELECT TRIM(TRAILING '.00' FROM price_column)
FROM table_name

Answer 10

If you are using PHP as the scripting language you may use the following:

$var = (float)$var_having_extra_0; // $var = (float) 17.5000

Or use the PHP floatval function:

$var = floatval($var_having_extra_0); // $var = floatval(17.5000)

Answer 11

Using ROUND or CEILING, in the query you just have to type:

SELECT ROUND(2/50) 

or

SELECT CEILING(2/50)

Answer 12

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 13

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.

Answer 14

Taking fragments of the others answers in this page I came to this conclusion:

SELECT ( IF(
    myfield LIKE '%.%', 
    TRIM(TRAILING '.' FROM TRIM(TRAILING '0' FROM myfield)),
    myfield
) ) FROM mytable

Cheers

Answer 15

SELECT TRIM(TRAILING '0' FROM yourodds)
FROM ...

Docs for the TRIM function .