How to resolve the issue of MySQL round function not working?

There could be several reasons why the ROUND function in MySQL is not working properly.

1. The data types do not match: the ROUND function can only be used on fields or expressions of numeric type. If you try to apply the ROUND function to a field or expression that is not a numeric type, it will not work. Make sure the field or expression you are applying the ROUND function to is of numeric type.
2. Incorrect parameters: The ROUND function requires two parameters, the first one being the field or expression to be rounded, and the second one being the number of decimal places to keep. Make sure to provide the correct parameters when using the ROUND function.
3. Data length exceeds range: If the length of the number to be rounded is beyond the supported range of MySQL, it may cause the ROUND function to not work properly. Ensure that the length of the number intended for rounding is within the supported range of MySQL.
4. Version compatibility issue: Some versions of MySQL may have problems with the ROUND function, especially older versions. Make sure you are using the latest version of MySQL and refer to the official documentation to understand how the ROUND function works in that version.

If you are still experiencing issues with the ROUND function not working, please provide more specific information such as the query statement, data examples, and MySQL version to better assist you in resolving the problem.