Photoshop/Web design and SEO

Suppose you have a table where each row is associated with a certain group (For example, orders are associated with the customers placing them) where each item WITHIN the group has a distinct number (For example dedicated hosting, each person my have a sequence of competition results - each person, therefore, has a 1st, 2nd, 3rd... competition).
If you would like to renumber items within their group so that each has the same baseline (say 0), here is an example way to proceed domain names:

Create TEMPORARY Table Groups (Id INTEGER AUTO_INCREMENT PRIMARY KEY,
Name VARCHAR(31), GroupId VARCHAR(31), ValWithinGroup INTEGER);
INSERT INTO Groups VALUES (null, "Davy", "Boy", 2);
INSERT INTO Groups VALUES (null, "Mary", "Girl", 2);
INSERT INTO Groups VALUES (null, "Bill", "Boy", 5);
INSERT INTO Groups VALUES (null, "Jill", "Girl", -3);
INSERT INTO Groups VALUES (null, "Fred", "Boy", 3);

# Find the lowest value for each group search engine marketing
CREATE TEMPORARY TABLE GroupSum AS SELECT GroupId, MIN(ValWithinGroup)
AS baseVal FROM Groups GROUP BY GroupId;
# create an index so mySQL can efficiently match
ALTER TABLE GroupSum ADD UNIQUE (GroupId);
# finally, make the baseline adjustment
UPDATE Groups LEFT JOIN GroupSum USING (GroupId)
SET ValWithinGroup=ValWithinGroup-baseVal;
SELECT * FROM Groups;
# 1 Davy Boy 0
# 2 Mary Girl 5 credit card processing
# 3 Bill Boy 3
# 4 Jill Girl 0
# 5 Fred Boy 1
#Each group ("Boy", "Girl") now has a (lowest) ValWithinGroup entry of 0.