Oracle dba常用sql

1.--根据hash_value查询单条语句执行情况

SELECT tim.start_time AS "daytime",

ROUND(SUM(stf.active_time), 2) AS "in_oracle_time",

ROUND(SUM(cpu_used), 2) AS "using_cpu_time",

ROUND(SUM(wait_io), 2) AS "io_wait",

ROUND(SUM(wait_buffer), 2) AS "buffer_wait",

ROUND(SUM(wait_latch), 2) AS "latch_wait",

SUM(executions_started) AS "exec_no",

decode(SUM(executions_started),

0,

SUM(stf.active_time),

ROUND(SUM(stf.active_time) / SUM(executions_started), 2)) AS "avg_exec_time"

FROM fglpa4.quest_sc_sql_stat_fact stf,

fglpa4.quest_time_dim tim,

fglpa4.quest_ctrl_pyramid_levels pyr,

fglpa4.quest_sc_sql_syntax_dim sql

WHERE stf.instance_key in

(select instance_key

from fglpa4.quest_instance_dim

where upper(instance_name) = upper('invdeal'))

AND stf.time_key = tim.time_key

AND tim.pyramid_level = pyr.level_id

AND tim.start_time >= trunc(SYSDATE - 30, 'DD')

AND tim.end_time <= trunc(SYSDATE, 'DD')

AND pyr.resolution_type = 5

AND stf.syntax_key = sql.syntax_key

AND sql.oracle_hash_value = 3172821298

GROUP BY tim.start_time

ORDER BY tim.start_time

2.查询执行计划

select id,

lpad(' ', depth * 4) || operation operation,

options,

object_owner,

object_name,

optimizer,

cost,

cardinality,

bytes,

cpu_cost,

io_cost,

temp_space,

access_predicates

from v$sql_plan

where hash_value = 3290770933;

set pagesize 999

select '| Operation | PHV/Object Name | Rows | Bytes| Cost |'

as "Optimizer Plan:" from dual

union all

select

rpad('| '||substr(lpad(' ',1*(depth-1))||operation||

decode(options, null,'',' '||options), 1, 35), 36, ' ')||'|'||

rpad(decode(id, 0, '------------- '

, substr(decode(substr(object_name, 1, 7), 'SYS_LE_', null, object_name)

||' ',1, 30)), 31, ' ')||'|'||

lpad(decode(cardinality,null,' ',

decode(sign(cardinality-1000), -1, cardinality||' ',

decode(sign(cardinality-1000000), -1, trunc(cardinality/1000)||'K',

decode(sign(cardinality-1000000000), -1, trunc(cardinality/1000000)||'M',

trunc(cardinality/1000000000)||'G')))), 7, ' ') || '|' ||

lpad(decode(bytes,null,' ',

decode(sign(bytes-1024), -1, bytes||' ',

decode(sign(bytes-1048576), -1, trunc(bytes/1024)||'K',

decode(sign(bytes-1073741824), -1, trunc(bytes/1048576)||'M',

trunc(bytes/1073741824)||'G')))), 6, ' ') || '|' ||

lpad(decode(cost,null,' ', decode(sign(cost-10000000), -1, cost||' ',

decode(sign(cost-1000000000), -1, trunc(cost/1000000)||'M',

trunc(cost/1000000000)||'G'))), 8, ' ') || '|' as "Explain plan"

from v$sql_plan sp

where sp.hash_value=&1;

3.查看session并kill

SELECT p.spid, a.serial#, c.object_name, b.session_id, b.oracle_username,

b.os_user_name

FROM v$process p, v$session a, v$locked_object b, all_objects c

WHERE p.addr = a.paddr AND a.process = b.process

AND c.object_id = b.object_id;

SELECT sid, serial#, username, osuser FROM v$session where osuser = 'TUSHAN348';

alter system kill session '216,23111';

alter system kill session '281,44571';

4.查看表空间大小

SELECT UPPER(F.TABLESPACE_NAME) "表空间名",

　　D.TOT_GROOTTE_MB "表空间大小(M)",

　　D.TOT_GROOTTE_MB - F.TOTAL_BYTES "已使用空间(M)",

　　TO_CHAR(ROUND((D.TOT_GROOTTE_MB - F.TOTAL_BYTES) /

D.TOT_GROOTTE_MB * 100,

　　2),

　　 '990.99') "使用比",

　　F.TOTAL_BYTES "空闲空间(M)",

　　F.MAX_BYTES "最大块(M)" 　　FROM (SELECT TABLESPACE_NAME,

　　ROUND(SUM(BYTES) /

(1024 * 1024),

2) TOTAL_BYTES,

　　ROUND(MAX(BYTES) /

(1024 * 1024),

2) MAX_BYTES 　　FROM SYS.DBA_FREE_SPACE 　　GROUP BY TABLESPACE_NAME) F,

　　 (SELECT DD.TABLESPACE_NAME,

　　ROUND(SUM(DD.BYTES) / (1024 * 1024), 2) TOT_GROOTTE_MB 　　FROM SYS.DBA_DATA_FILES DD 　　GROUP BY DD.TABLESPACE_NAME) D 　　WHERE D.TABLESPACE_NAME = F.TABLESPACE_NAME 　　ORDER BY 4 DESC