Fix MySQL Datetime Precision Errors

The default precision for the datetime data type in MySQL is seconds. If there are errors in querying data, it may be due to a precision mismatch. There are two ways to resolve this issue.

1. Change the precision of the data type: Modify the datetime data type to timestamp data type. The timestamp data type has millisecond-level precision, which allows for more accurate storage and retrieval of time. You can use the ALTER TABLE statement to modify the field type of the data table.
2. Modify the column name to a timestamp with precision of 3 in the table.
3. Here, the (3) represents a precision of 3 milliseconds.
4. Convert data using date functions: If you are unable to change the data type, you can use date functions to convert data during the query. For example, use the DATE_FORMAT function to convert a datetime type field into a string with specified precision.
5. Retrieve the date and time in the format ‘YYYY-MM-DD HH:MM:SS.MS’ from the table.
6. The placeholder ‘%f’ here represents milliseconds and can be adjusted for precision as needed.

You can choose between the two methods depending on the specific situation. If you need more precise time accuracy, it is recommended to adjust the data type precision; if you are just temporarily querying data, you can use date functions for conversion.