sql query that groups different items into buckets

Question

I am trying to write a query that returns the count of items whose price falls into certrain buckets:

For example if my table is:

item_name | price
i         


        

Answer 1

A bit of modification of DRapp's code...

select
case when price >= 0 and price < 10    then "  0 - 10"
           when price > 10 and price <= 50   then " 10+ - 50"
           when price > 50 and price <= 100  then " 50+ - 100"
           else "over 100"
end As PriceRange,
count(item_name) as ItemTotal
from YourTable
group by 
case when price >= 0 and price < 10    then "  0 - 10"
           when price > 10 and price <= 50   then " 10+ - 50"
           when price > 50 and price <= 100  then " 50+ - 100"
           else "over 100"
end;

Answer 2

You can try grouping by 10 units of price:

SELECT COUNT(*) AS tally,
       FLOOR(price/10) AS prange,
       CONCAT(10*FLOOR(price/10), "-", 10*FLOOR(price/10)+9) AS rstr
FROM my_table
GROUP BY prange;

Answer 3

An expanded option from what Kerrek described, you can do you grouping based on a case/when

select
      case when price >= 0 and price <= 10    then '  0 - 10'
           when price > 10 and price <= 50   then ' 10+ - 50'
           when price > 50 and price <= 100  then ' 50+ - 100'
           else 'over 100'
      end PriceRange,
      count(*) as TotalWithinRange
   from
      YourTable
   group by 1

Here, the "group by 1" represents the ordinal column in your select statement... in this case, the case/when as TotalWithinRange.