Bitwise AND and OR in a PL/SQL function

Is there a function or operator for a bitwise AND and OR function in PL/SQL. I need to OR together some numbers and then put them into a single field. i.e. 2 OR 4 = 6; 2 OR 2 = 2. I also need an AND function to check which bits are already on. Does oracle have these bitwise functions?

A shift left and shift right operator would be nice too but not as critical.

Thanks

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Jake Anderson
jakeanderson_at_byu.edu
MTC Development