- add pk instructions for oracle
- add pk instructions for oracle

alex/sqlalchemy,wfxiang08/sqlalchemy,dstufft/sqlalchemy,bootandy/sqlalchemy,EvaSDK/sqlalchemy,inspirehep/sqlalchemy,Cito/sqlalchemy,276361270/sqlalchemy,WinterNis/sqlalchemy,epa/sqlalchemy,halfcrazy/sqlalchemy,276361270/sqlalchemy,elelianghh/sqlalchemy,bdupharm/sqlalchemy,elelianghh/sqlalchemy,monetate/sqlalchemy,Akrog/sqlalchemy,epa/sqlalchemy,Akrog/sqlalchemy,itkovian/sqlalchemy,itkovian/sqlalchemy,wfxiang08/sqlalchemy,pdufour/sqlalchemy,graingert/sqlalchemy,zzzeek/sqlalchemy,pdufour/sqlalchemy,sandan/sqlalchemy,dstufft/sqlalchemy,davidfraser/sqlalchemy,brianv0/sqlalchemy,wujuguang/sqlalchemy,davidjb/sqlalchemy,brianv0/sqlalchemy,ThiefMaster/sqlalchemy,j5int/sqlalchemy,sqlalchemy/sqlalchemy,alex/sqlalchemy,bdupharm/sqlalchemy,EvaSDK/sqlalchemy,robin900/sqlalchemy,inspirehep/sqlalchemy,davidjb/sqlalchemy,graingert/sqlalchemy,robin900/sqlalchemy,ThiefMaster/sqlalchemy,olemis/sqlalchemy,sandan/sqlalchemy,alex/sqlalchemy,Cito/sqlalchemy,wujuguang/sqlalchemy,hsum/sqlalchemy,bootandy/sqlalchemy,davidfraser/sqlalchemy,j5int/sqlalchemy,WinterNis/sqlalchemy,halfcrazy/sqlalchemy,olemis/sqlalchemy,Cito/sqlalchemy,hsum/sqlalchemy,monetate/sqlalchemy