关于mysql的行转列问题

一张表，里面有? id? name?? state??? customerid 4个字段，其中status有3个值0 1 2 ，用一条sql查询出此种格式

select customid,      count(case status when 0 then status else null end) as status-0,      count(case status when 1 then status else null end) as status-1,      count(case status when 2 then status else null end) as status-2      from custom group by customid.  

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