Question

I have the below table I need all value from colE to update to colA is it possible to do it with one SQL?

TableA

colA    colB    colC    colD    colE
 a       b       x       y       z
 b       c       d       f       h
 c       d       f       w       v
 v       f       f       f       f

to update colA with value from colE

TableA

colA    colB    colC    colD    colE
 z       b       x       y       z
 h       c       d       f       h
 v       d       f       w       v
 f       f       f       f       f

Answer 1

This is too simple:

update tableA set colA = colE;