What does “&” means in this sql where clause?

Question

What does the \"&\" mean here:

select pt.TrTp, sum(pt.TrTp)
from ProdTr pt
where TransSt & 16 <> 16  // this is the row that i don´t understand..
g         


        

Answer 1

This is bitwise AND. It simply checks if bit 4 in value is NOT set.

I would rewrite this expression as TransSt & 16 = 0