Resort Web Design Improves Guest Booking Rates By Fifty Percent

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r.resortname, count(*) totalbooking , sum(b.totalcharge) as totalamount from resort r inner join booking b on b.resortid = r.resortid group by r.resortid, r.resortname order by r.resortid; Note that table aliases. Performance optimization strategies of last resort [closed] Asked 16 years, 8 months ago Modified 1 year, 1 month ago Viewed 96k times Jul 31, 2021 · It will always be more efficient to use more specific change events if you can. Rely on notifyDataSetChanged as a last resort. RecycleView edit question: the want us to use DiffUtil docs.