Grameenphone IPO

Bangladesh's Grameenphone expects IPO soon Reuters - USA DHAKA, June 27 (Reuters) - Top Bangladesh mobile phone carrier Grameenphone, 62 percent owned by Norway's Telenor (TEL.OL), said on Saturday it expected to ... See all stories on this topic

Comparing two oracle table

The heading of this post may remind you the "minus" operator of oracle.

           select * from tableA  minus   select * from tableB 

Really this is the easiest solution. But this easiness has a huge cost in terms of speed. I was searching on this just now. Got few nice solutions for the everyday problem in oracle. Solutions are made in numerous ways with "not in", special union and hashing.