Question

Sample data:

LOCATION   NAME   LABEL1   LABEL2 SERVICE TIME
NY         Andrew    A       B      HOUSE  2555
NY         Andrew    A       B      CAR    35
NJ         Copley    C       A      HOUSE  1025
NY         Copley    A       B      HOUSE  650
VA         Dalton    D       C      PET    25

What I want to do is add another column where in it shows sum(Time) of rows with same data except for the Service.Also, the services that I need are only the sum of car and house.Is this possible? If not can you help me with the right query

Sample output I need:

LOCATION   NAME   LABEL1   LABEL2 SERVICE TIME     SUM
NY         Andrew    A       B      HOUSE  2555    **2590**
NY         Andrew    A       B      CAR    35
NJ         Copley    C       A      HOUSE  1025    1025
NY         Copley    A       B      HOUSE  650     650

Answer 1

SELECT `LOCATION`, `NAME`, `LABEL1`, `LABEL2`, SUM(`TIME`)
  FROM `myTable`
 WHERE `SERVICE` = "CAR" OR `SERVICE` = "HOUSE"
 GROUP BY `LOCATION`, `NAME`, `LABEL1`, `LABEL2`

This does not add another column, but it does return the data you requested in a resultset when run as a query. I recommend taking this approach.

You should also ensure that your indexes are set up optimally for this sort of query.