请教:数据库查询,某一列 统计原表如下:NameTypeLevelA-1A1A-2A2C-1C1C-2C2A-3A1C-3C2怎么样能查询出下面的表呢?NameLevel_1Level_2A21C12[解决办法]
select type, sum(if(level=1,1,0)) as level_1, sum(if(level=2,1,0)) as level_2from yourTablegruop by type