Sink multiple tables into one table that has different columns

Hi friends

I have an issue that i have a so many tables(around 50) with almost same columns but in some tables i have 2 or 3 extra column..
for example..;

table1,table2,table3,table7,table8 has columns

clo1,col2,col3,col4,col5
and

table10,table22,table33 has columns

clo1,col2,col3,col4,col5,col6,col7,col8

and  

table10,table22,table33,table47,table78 has columns

clo1,col2,col3,col4,col5,col6,col7,col8,col9,col10

now many need is i want to sink all these tables in one on daily basis.

hurdles:

if i used union all then column differs come .

kindly help me to sort out this issue.
please suggest something ..


Regard

BI_group