Jeff Moden (12/22/2008)
Here's a real cheater method...
SELECT SIGN(SUM(Col1+0)), SIGN(SUM(Col2+0)), SIGN(SUM(Col3+0))FROM SomeTable
That only works for the first bit. I have a similar problem where we use the first 5 bits as "permissions" on objects and I need to OR the values from multiple rows. Unfortunately, I'm performing RBAR, albeit without a cursor (using SQL Server's multiple row select into a scalar variable approach), in a UDF. E.g.,
SELECT @v_permissions = ISNULL(@v_permissions, 0) | x.permissions FROM ...
Any T-SQL tricks? E.g., the following values need to be OR'd together with the result being (decimal) 31.
[font="Courier New"]Bit Mask Decimal Value
0000000001 1
0000000101 5
0000000111 7
0000010001 17
0000010011 19
0000011101 29[/font]