Remove trailing zeros in decimal value with changing length

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`;