1) How can I insert a column into my table DATA, and make it my
primary key (that will just be a number starting at 1 and increasing n
+1)...

2) I have a column named DATEID in a table DATA that contains the
following format connected to each other(date and name):

20071030Jones
20071020Smith
20070918Rogers
20080122Williams
etc..

What would the syntax be to insert a column to the right of this one,
and extract the first 8 digits from the data in the DATEID column and
insert that into the new column DATE, therefore making it easier for
me to query against an actual date?

Thanks