Problem Using ROW_NUMBER() function in MariaDB

Question

I would like to have a row number column in a select table output, but when I try using the ROW_NUMBER() function MariaDB throws a syntax error. There are several references on

Answer 1

Window functions are supported in MariaDB 10.2 or higher version only.

MariaDB 10.2 or higher:

SELECT 
    MyData.*,
    ROW_NUMBER() OVER ( ORDER BY ID ) as Therow
FROM MyData 
WHERE Date_Reading > Now()- INTERVAL 3 HOUR;

For lower version:

We can use the MySQL variable to do this job.

SELECT 
    MyData.*, 
    @row_num:= @row_num + 1 AS Therow
FROM 
    MyData, 
    (SELECT @row_num:= 0 AS num) AS c
WHERE Date_Reading > Now()- INTERVAL 3 HOUR
ORDER BY test.`date` ASC;