select city, count(*) as cnt from market_analysis_rt_edu group by city;

select city, avg(edu_time) from market_analysis_rt_edu group by city;


            L.tileLayer('https://api.maptiler.com/maps/positron/{z}/{x}/{y}.png?key=IHLiEj11tKzE3WCyeanP',{
                id : 'mapbox/light-v9',
                tilesize: 512,
                attribution: '<a href="https://www.maptiler.com/copyright/" target="_blank">&copy; MapTiler</a> <a href="https://www.openstreetmap.org/copyright" target="_blank">&copy; OpenStreetMap contributors</a>',
                zoomOffset: -1
            }).addTo(map)