I am stuck on this question. Can anyone help?
Write a query to print the sum of all total investment values in 2015 (TIV_2012) toa scale of 2 decimal places, for all policyholders who meet the following criteria:
1) Have the same TIV_2011 value as one or more other policyholders.
2) Are not located in the same city as another policy holder (i.e. (latitude, longitude) attribute pair must be unique,
the input format islike this , The table is
Insurance table is described as follows:
Column Name Type
where PID is the policyholder's policy ID, TIV_2011 is the total investment in 2011,TIV_2012 is the total investment in 2012, LAT is the latitude of the policy holder's city and LON is the longitude of the policy holder's city.
For example if thhe data is
PID, TIV_2011, TIV_2012, lat, lon
SELECT SUM(t1.TIV_2012) FROM Insurance t1 INNER JOIN ( SELECT TIV_2011 FROM Insurance GROUP BY TIV_2011 HAVING COUNT(*) > 1 ) t2 ON t1.TIV_2011 = t2.TIV_2011 INNER JOIN ( SELECT lat, lon FROM Insurance GROUP BY lat, lon HAVING COUNT(*) = 1 ) t3 ON t1.lat = t3.lat AND t1.lon = t3.lon