Question

Is it possible in mysql to create a table with a column that combines two column values? something like this:

create table test1 (
    number1 int,
    number2 int,
    total int DEFAULT (number1+number2)
);

or like this :

CREATE TABLE `Result` (
    `aCount` INT DEFAULT 0,
    `bCount` INT DEFAULT 0,
    `cCount` =  `aCount` + `bCount`
);

Answer 1

It is not possible to do that exactly, but you can create a view based on a query that combines them:

CREATE VIEW `my_wacky_view` AS
SELECT `number1`, `number2`, `number1` + `number2` AS `total`
FROM `test1`;

I would avoid actually storing the combined data in a table, unless you’re going to be running lots of queries that will reference the combined data in their WHERE clauses.