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I have a mySQL table with multiple columns (tinyint) with 0 or 1 values

I want to convert all these values into bits in a single integer column So a column named column1 will go to MSB another column will set 2nd bit etc...

How do I do it?

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  • can you explain better? I don't get your problem
    – jcho360
    May 17, 2012 at 14:52

1 Answer 1

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Use logical shifts << plus a bitwise or | operation.

For example:

SELECT (col1<<16) | (col2<<15) | (col3<<14) | (col4<<13) ...

MySQL docs are here.

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  • As long as a user remembers the order of the columns processed and has no need to do any mass querying of a single bit, this look like a good solution. +1 May 17, 2012 at 16:23
  • You mean bitwise OR | operator. Thanks ! that was helpful
    – Nir
    May 17, 2012 at 16:39

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