Question

Hi I have a table with name test. it got 7 columns id , a , b , c , d , e , f. All this columns contains either 1 or 0. Now i want make a query where i can choose only those columns whose value is 1.

Something like this:

select (condition) from test where id = 5;  

because i have a hotel table with 50 columns out of which 11 columns contains either 1 or 0 representing the facilities of the hotel. I want to make a query which just tells what are the facilities of the hotel.

Any help would be great.

Answer 1

select id, (a*64)+(b*32)+(c*16)+(d*8)+(e*4)+(f*2)+(g*1)
from test

this number you can reverse it to convert to a 7 digit binary code.

examples:
18 = 0010010 , 1000000 = 64