SQL语句统计每小时，每天、每月、每年的_数据

--by hours

SELECT TO_CHAR(oper_time, 'hh24') AS "Each HOUR", COUNT(id) AS qty

FROM T_SYS_OPER_LOG  

WHERE  oper_time  BETWEEN TO_DATE('2014-01-01 00:00:00','yyyy-mm-dd hh24:mi:ss') AND TO_DATE('2014-12-31 23:59:59','yyyy-mm-dd hh24:mi:ss') 

GROUP BY TO_CHAR(oper_time, 'hh24')

 

--by day

SELECT TO_CHAR(oper_time,'DD')AS "Each day", COUNT(id) AS qty

FROM T_SYS_OPER_LOG  

WHERE  oper_time  BETWEEN TO_DATE('2014-01-01 00:00:00','yyyy-mm-dd hh24:mi:ss') AND TO_DATE('2014-12-31 23:59:59','yyyy-mm-dd hh24:mi:ss') 

GROUP BY  TO_CHAR(oper_time,'DD')

 

  --by week

SELECT TO_CHAR(oper_time,'iw')AS "Each Week", COUNT(id) AS qty

FROM T_SYS_OPER_LOG  

WHERE  oper_time  BETWEEN TO_DATE('2014-01-01 00:00:00','yyyy-mm-dd hh24:mi:ss') AND TO_DATE('2014-12-31 23:59:59','yyyy-mm-dd hh24:mi:ss') 

GROUP BY  TO_CHAR(oper_time,'iw')

 --by month

SELECT TO_CHAR(oper_time,'MM')AS "Each MOnth", COUNT(id) AS qty

FROM T_SYS_OPER_LOG  

WHERE  oper_time  BETWEEN TO_DATE('2014-01-01 00:00:00','yyyy-mm-dd hh24:mi:ss') AND TO_DATE('2014-12-31 23:59:59','yyyy-mm-dd hh24:mi:ss') 

GROUP BY  TO_CHAR(oper_time,'MM')

--by quart

SELECT TO_CHAR(oper_time,'q')AS "Each MOnth", COUNT(id) AS qty

FROM T_SYS_OPER_LOG  

WHERE  oper_time  BETWEEN TO_DATE('2014-01-01 00:00:00','yyyy-mm-dd hh24:mi:ss') AND TO_DATE('2014-12-31 23:59:59','yyyy-mm-dd hh24:mi:ss') 

GROUP BY  TO_CHAR(oper_time,'q')

--by year

--by quart

SELECT TO_CHAR(oper_time,'YYYY')AS "Each MOnth", COUNT(id) AS qty

FROM T_SYS_OPER_LOG  

WHERE  oper_time  BETWEEN TO_DATE('2014-01-01 00:00:00','yyyy-mm-dd hh24:mi:ss') AND TO_DATE('2014-12-31 23:59:59','yyyy-mm-dd hh24:mi:ss') 

GROUP BY  TO_CHAR(oper_time,'YYYY')