Question

i have these on my data base

year | city
2011 | new york
2010 | LA
2010 | LA
2010 | new york
2012 | texas

i have a 2 column contains named year and town_city

and i want to have the highest number of town_city each year .

outout should be

year | city | total
2011 | new york | 1
2010 | LA | 2
2012 | texas | 1

Answer 1

What you can get your desired result using this:

SELECT year, city, count(*)
FROM city_table ct1
WHERE year=(SELECT max(year) FROM city_table ct2 WHERE ct2.city=ct1.city)
GROUP BY year, city