SELECT TO_CHAR(TO_DATE(ACCEPT_TIME, 'yyyy-mm-dd hh24:mi:ss'), 'yyyy-mm-dd') dt, type, COUNT(*) from T_LIST WHERE to_char(to_date(ACCEPT_TIME,'yyyy-mm-dd hh24:mi:ss'),'MM')=to_char(SYSDATE-1,'MM') GROUP BY TO_CHAR(TO_DATE(ACCEPT_TIME, 'yyyy-mm-dd hh24:mi:ss'), 'yyyy-mm-dd'),type ORDER BY TO_CHAR(TO_DATE(ACCEPT_TIME, 'yyyy-mm-dd hh24:mi:ss'), 'yyyy-mm-dd');
下个Oracle for vista 版本的安装试试 10G和11G的 http://www.oracle.com/technology/software/products/database/index.html ------------------------------------------- ......