AWR TOP SQL实现

1 按解析次数排序
```select a.*,
to_char(substr(b.sql_text,1,4000))
from
(select dhs.sql_id,
sum(parse_calls_delta) parse,
sum(executions_delta) exec_nums,
dhs.MODULE
from dba_hist_sqlstat dhs
where
snap_id  > 22438
and snap_id <= 22440
group by dhs.sql_id,MODULE) a,
dba_hist_sqltext b
where a.sql_id=b.sql_id order by a.parse desc;
```
2 按执行时间排序
```select a.*,
to_char(substr(b.sql_text,1,4000))
from
(select dhs.sql_id,
round(sum(elapsed_time_delta)/1000/1000,2) "elapsed_time(s)",
sum(executions_delta) execs,
round(sum(elapsed_time_delta)/1000/1000/sum(executions_delta),2)  elapsed_time_per,
dhs.MODULE
from dba_hist_sqlstat dhs
where
snap_id  > 22438
and snap_id <= 22440
group by dhs.sql_id,MODULE) a,
dba_hist_sqltext b
where a.sql_id=b.sql_id order by a."elapsed_time(s)" desc;
```
3 按CPU时间排序
```select a.*,
to_char(substr(b.sql_text,1,4000))
from
(select dhs.sql_id,
round(sum(cpu_time_delta)/1000/1000,2) "cpu_time",
sum(executions_delta) execs,
round(sum(cpu_time_delta)/1000/1000/sum(executions_delta),2)  cpu_time_per,
round(sum(elapsed_time_delta)/1000/1000,2) "elapsed_time(s)",
dhs.MODULE
from dba_hist_sqlstat dhs
where
snap_id  > 22438
and snap_id <= 22440
group by dhs.sql_id,MODULE) a,
dba_hist_sqltext b
where a.sql_id=b.sql_id order by a."cpu_time" desc;
```
4 按User I/O wait排序
```select a.*,
to_char(substr(b.sql_text,1,4000))
from
(select dhs.sql_id,
round(sum(iowait_delta)/1000/1000,2) "iowait_time(s)",
sum(executions_delta) execs,
round(sum(iowait_delta)/1000/1000/sum(executions_delta),2)  iowait_time_per,
round(sum(elapsed_time_delta)/1000/1000,2) "elapsed_time(s)",
dhs.MODULE
from dba_hist_sqlstat dhs
where
snap_id  > 22438
and snap_id <= 22440
group by dhs.sql_id,MODULE) a,
dba_hist_sqltext b
where a.sql_id=b.sql_id order by a."iowait_time(s)" desc;
```
5 按逻辑读(gets)排序
```select a.*,
to_char(substr(b.sql_text,1,4000))
from
(select dhs.sql_id,
round(sum(buffer_gets_delta),2) "buffer_ges",
sum(executions_delta) execs,
round(sum(buffer_gets_delta)/sum(executions_delta),2)  iowait_time_per,
round(sum(elapsed_time_delta)/1000/1000,2) "elapsed_time(s)",
dhs.MODULE
from dba_hist_sqlstat dhs
where
snap_id  > 22438
and snap_id <= 22440
group by dhs.sql_id,MODULE) a,
dba_hist_sqltext b
where a.sql_id=b.sql_id order by a."buffer_ges" desc;
```
```select a.*,
to_char(substr(b.sql_text,1,4000))
from
(select dhs.sql_id,
sum(executions_delta) execs,
round(sum(elapsed_time_delta)/1000/1000,2) "elapsed_time(s)",
dhs.MODULE
from dba_hist_sqlstat dhs
where
snap_id  > 22438
and snap_id <= 22440
group by dhs.sql_id,MODULE) a,
dba_hist_sqltext b
where a.sql_id=b.sql_id order by a."physical_read" desc;
```

8 按执行次数排序
```select a.*,
to_char(substr(b.sql_text,1,4000))
from
(select dhs.sql_id,
round(sum(executions_delta),2) "exec_num",
sum(ROWS_PROCESSED_DELTA) row_process,
round(sum(ROWS_PROCESSED_DELTA)/sum(executions_delta),2)  rows_per_exec,
round(sum(elapsed_time_delta)/1000/1000,2) "elapsed_time(s)",
dhs.MODULE
from dba_hist_sqlstat dhs
where
snap_id  > 22438
and snap_id <= 22440
group by dhs.sql_id,MODULE) a,
dba_hist_sqltext b
where a.sql_id=b.sql_id order by a."exec_num" desc;
```

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