MySQL user defined functions

Question

I have a table contains a few columns say: column_1, column_2 and column_3.

I appended an new column to the table called score. What I want to do is calculate the sc

Answer 1

Yes.

CREATE FUNCTION `getScore`(`a` DECIMAL(12,4), `b` DECIMAL(12,4), `c` DECIMAL(12,4)) RETURNS DECIMAL(12,4)
BEGIN
    RETURN a + b + c;
END

SELECT getScore(0.3, 0.4, 0.5)
-> 1.2000

But if you need some values from the table, you need to include those as parameters too.

SELECT getScore(column1, column2, column3, 0.5, 0.1, 0.4) AS score FROM table