If b. columname3 is a numeric column you can always do the old
1. select a.columname1, b.columname1
from table1 a,table2 b
where a.columname2 = CAST(b. columname3 as int)
But if the values in columname3 are truly int you change your table definintion
2. Depends on what the conditions are. I used to be a DTS guy but I just got done reading the entire Books Online documention regarding BCP and it is a lot more flexible and powerful than I used to think it was.
If one brings so much courage to this world the world has to kill them or break them, so of course it kills them. The world breaks every one and afterward many are strong at the broken places. But those that will not break it kills. It kills the very good and the very gentle and the very brave impartially. If you are none of these you can be sure it will kill you too but there will be no special hurry. Earnest Hemingway, A Farewell To Arms.