比如：统计表AA中YWLX列在某年某月每种类型各有多少? select year(AA_YWRQ) as YEARS, month(AA_YWRQ) AS Months ,AA_YWLX,count(AA_YWLX) as Number from AA group by year(AA_YWRQ), month(AA_YWRQ),AA_YWLX 表中数据： 查询后的结果：

　　比如：统计表AA中YWLX列在某年某月每种类型各有多少?

　　select

　　year(AA_YWRQ) as YEARS,

　　month(AA_YWRQ) AS Months ,AA_YWLX,count(AA_YWLX) as Number

　　from AA

　　group by year(AA_YWRQ),

　　month(AA_YWRQ),AA_YWLX

　　表中数据：

　　查询后的结果：