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

Try to create view

CREATE VIEW v_months 
AS 
SELECT *, CONCAT( CAST(jan AS CHAR(1)), 
                  CAST(feb AS CHAR(1)),
                  CAST(mar AS CHAR(1)),
                  ...) AS all 
FROM months

You will get something like this:

aa, 0, 0, 1, 0, 0010
ab, 1, 0, 1, 0, 1010
ac, 1, 1, 0, 0, 1100
ad, 1, 1, 1, 0, 1110

And then you can query

SELECT * FROM v_months WHERE all = '100110010101'

Or if you want query "get all rows, where feb = 1", you can write like this:

SELECT * FROM v_months WHERE all LIKE '_1____________'    

where '_' matches exactly one character.

Answer 2

You can use vectors in MySQL:

select * from table where (january, february) = (1, 1)

Beware of different server and client collations for text columns, possibly you'll need to specify collation explicitly then.

Answer 3

select * from table where 1 in (january, february)