mysql - How do I create a SQL query that groups in certain percent range -

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i create sql query groups increase price of items in percentage range. example

2 items increased between 0 10 %

4 items increased between 10 20%

2 items increased between 20 30%

...

target server: mysql

select sum(case when percentchange >= 0 , percentchange <= 10 1 else 0) end zeroten,        sum(case when percentchange > 10 , percentchange <= 20 1 else 0) end tentwenty,        sum(case when percentchange > 20 , percentchange <= 30 1 else 0) end twentythirty     magicchangetable

note: magicchangetable may in fact subquery calculate percent change.


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