string sql = "select to_char(StartTime, ‘yyyy‘)||‘-‘|| to_char(StartTime, ‘mm‘)||‘-‘||
to_char(StartTime, ‘dd‘)||‘ ‘|| to_char(StartTime, ‘hh24‘)||‘:‘||
floor(to_char(StartTime, ‘mi‘)/15)*15 statime, sum(Count) as Counts from
table where StartTime <= to_date(‘2016-11-29 18:00:00‘ ,‘YYYY-MM-DD hh24:mi:ss‘)
group by to_char(StartTime, ‘yyyy‘)||‘-‘|| to_char(StartTime, ‘mm‘)||‘-‘||
to_char(StartTime, ‘dd‘)||‘ ‘|| to_char(StartTime, ‘hh24‘)||‘:‘||
floor(to_char(StartTime, ‘mi‘)/15)*15 order by statime";
string sql = "select to_char(StartTime, ‘yyyy‘)||‘-‘|| to_char(StartTime, ‘mm‘)||‘-‘||" +
"to_char(StartTime, ‘dd‘)||‘ ‘|| to_char(StartTime, ‘hh24‘)||‘:‘|| " +
"floor(to_char(StartTime, ‘mi‘)/15)*15 statime, sum(Count) as Counts" +
" from table " +
"where StartTime <= to_date(‘2016-11-29 18:00:00‘ ,‘YYYY-MM-DD hh24:mi:ss‘) " +
"group by to_char(StartTime, ‘yyyy‘)||‘-‘|| " +
"to_char(StartTime, ‘mm‘)||‘-‘|| to_char(StartTime, ‘dd‘)||‘ ‘|| " +
"to_char(StartTime, ‘hh24‘)||‘:‘|| floor(to_char(StartTime, ‘mi‘)/15)*15 order by statime";
如上sql语句
StartTime是其中的时间字段
Count是汇总的字段，也可以count(*)统计记录数
table是表名，自己替换
也可以把15改成30，60等等需要统计汇总的分钟数
原文：http://www.cnblogs.com/jhlong/p/6244156.html