Matching a value to multiple columns (in one statement) from a table using MySQL

Question

I\'m working with a table in MySQL that contains the following columns:

id, january, february, march, april, etc

The data in the table looks li

Answer 1

How about solving the problem with a VIEW?

CREATE TABLE `d001ab05`.`months` (
`id` INT NOT NULL ,
`jan` BOOL NOT NULL ,
`feb` BOOL NOT NULL ,
`mar` BOOL NOT NULL ,
`apr` BOOL NOT NULL ,
`may` BOOL NOT NULL ,
`jun` BOOL NOT NULL ,
`jul` BOOL NOT NULL ,
`aug` BOOL NOT NULL ,
`sep` BOOL NOT NULL ,
`oct` BOOL NOT NULL ,
`nov` BOOL NOT NULL ,
`dec` BOOL NOT NULL ,
PRIMARY KEY ( `id` )
) ENGINE = InnoDB;

Insert data:

INSERT INTO `d001ab05`.`months` (
`id`, `jan`, `feb`, `mar`, `apr`, `may`, `jun`,
`jul`, `aug`, `sep`, `oct`, `nov`, `dec`
) VALUES (
'1', '1', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0'
), (
'2', '1', '1', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0'
), (
'3', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0'
), (
'4', '1', '1', '1', '1', '1', '1', '1', '1', '1', '1', '1', '1'
);

View with Select:

CREATE OR REPLACE VIEW `moncase` AS
SELECT id,
CASE WHEN `jan` =1 OR `feb` =1 OR `mar` =1 OR `apr` =1 OR `may` =1 OR
`jun` =1 OR `jul` =1 OR `aug` =1 OR `sep` =1 OR `oct` =1 OR `nov` =1 OR `dec` =1
THEN 1 ELSE 0 END AS or_over_months
FROM months;

Select:

SELECT * FROM `moncase` WHERE `or_over_months` = 1;

Result:

id | or_over_months
1  | 1
2  | 1
4  | 1