Oracle查看SQL執(zhí)行計(jì)劃的方式
Oracle查看SQL執(zhí)行計(jì)劃的方式
我們提供的服務(wù)有：成都網(wǎng)站制作、做網(wǎng)站、外貿(mào)營(yíng)銷網(wǎng)站建設(shè)、微信公眾號(hào)開發(fā)、網(wǎng)站優(yōu)化、網(wǎng)站認(rèn)證、南芬ssl等。為成百上千企事業(yè)單位解決了網(wǎng)站和推廣的問題。提供周到的售前咨詢和貼心的售后服務(wù)，是有科學(xué)管理、有技術(shù)的南芬網(wǎng)站制作公司
獲取Oracle sql執(zhí)行計(jì)劃并查看執(zhí)行計(jì)劃，是掌握和判斷數(shù)據(jù)庫性能的基本技巧。下面案例介紹了多種查看sql執(zhí)行計(jì)劃的方式：
基本有以下幾種方式：
1、通過sql_trace初始化參數(shù)
2、通過Autotrace
3、通過explain plan
4、通過dbms_xplan.display_cursor
5、通過dbms_xplan.display_awr
6、通過10046事件
1、通過explain plan 工具
12:24:00 SCOTT@ prod>explain plan for
12:24:06 2 select empno,ename,sal,deptno from emp where empno=7788;
Explained.
Elapsed: 00:00:00.22
12:24:16 SCOTT@ prod>select * from table(dbms_xplan.display);
PLAN_TABLE_OUTPUT
------------------------------------------------------------------------------------------------------
Plan hash value: 2949544139
--------------------------------------------------------------------------------------
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time |
--------------------------------------------------------------------------------------
| 0 | SELECT STATEMENT | | 1 | 46 | 2 (0)| 00:00:01 |
| 1 | TABLE ACCESS BY INDEX ROWID| EMP | 1 | 46 | 2 (0)| 00:00:01 |
|* 2 | INDEX UNIQUE SCAN | PK_EMP | 1 | | 1 (0)| 00:00:01 |
--------------------------------------------------------------------------------------
Predicate Information (identified by operation id):
---------------------------------------------------
2 - access("EMPNO"=7788)
14 rows selected.
Elapsed: 00:00:01.14
2、通過DBMS_XPLAN.display_cursor查看
12:52:37 SCOTT@ prod>desc dbms_xplan
FUNCTION DISPLAY_CURSOR RETURNS DBMS_XPLAN_TYPE_TABLE
Argument Name Type In/Out Default?
------------------------------ ----------------------- ------ --------
SQL_ID VARCHAR2 IN DEFAULT
CURSOR_CHILD_NO NUMBER(38) IN DEFAULT
FORMAT VARCHAR2 IN DEFAULT
如果以scott用戶訪問需要進(jìn)行授權(quán)：
12:31:44 SYS@ prod>select * from dict where upper(table_name)='V$SESSION';
TABLE_NAME COMMENTS
------------------------------ ----------------------------------------
V$SESSION Synonym for V_$SESSION
Elapsed: 00:00:00.09
12:31:09 SYS@ prod>grant select on V_$SESSION to scott;
Grant succeeded.
Elapsed: 00:00:00.10
12:43:15 SCOTT@ prod>select * from table(dbms_xplan.display_cursor(null,null,'advanced'));
PLAN_TABLE_OUTPUT
------------------------------------------------------------------------------------------------------
User has no SELECT privilege on V$SQL_PLAN
解決權(quán)限不足：
12:42:33 SYS@ prod>grant select any table to scott;
Grant succeeded.
12:43:46 SYS@ prod>show parameter o7
NAME TYPE VALUE
------------------------------------ ----------- ------------------------------
O7_DICTIONARY_ACCESSIBILITY boolean TRUE
12:44:54 SYS@ prod>
案例：dbms_xplan.display_cursor
12:42:45 SCOTT@ prod>select empno,ename,sal,deptno from emp where empno=7788;
EMPNO ENAME SAL DEPTNO
---------- ---------- ---------- ----------
7788 SCOTT 3000 20
Elapsed: 00:00:00.08
12:43:15 SCOTT@ prod>select * from table(dbms_xplan.display_cursor(null,null,'all'));
PLAN_TABLE_OUTPUT
------------------------------------------------------------------------------------------------------
SQL_ID bqz9ujgnn4jzu, child number 0
-------------------------------------
select empno,ename,sal,deptno from emp where empno=7788
Plan hash value: 2949544139
--------------------------------------------------------------------------------------
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time |
--------------------------------------------------------------------------------------
| 0 | SELECT STATEMENT | | | | 2 (100)| |
| 1 | TABLE ACCESS BY INDEX ROWID| EMP | 1 | 46 | 2 (0)| 00:00:01 |
|* 2 | INDEX UNIQUE SCAN | PK_EMP | 1 | | 1 (0)| 00:00:01 |
--------------------------------------------------------------------------------------
Query Block Name / Object Alias (identified by operation id):
-------------------------------------------------------------
PLAN_TABLE_OUTPUT
------------------------------------------------------------------------------------------------------
1 - SEL$1 / EMP@SEL$1
2 - SEL$1 / EMP@SEL$1
Predicate Information (identified by operation id):
---------------------------------------------------
2 - access("EMPNO"=7788)
Column Projection Information (identified by operation id):
-----------------------------------------------------------
1 - "EMPNO"[NUMBER,22], "ENAME"[VARCHAR2,10], "SAL"[NUMBER,22],
"DEPTNO"[NUMBER,22]
2 - "EMP".ROWID[ROWID,10], "EMPNO"[NUMBER,22]
32 rows selected.
Elapsed: 00:00:00.05
案例：
12:49:10 SCOTT@ prod>select empno,ename,sal,deptno from emp where empno=7788;
EMPNO ENAME SAL DEPTNO
---------- ---------- ---------- ----------
7788 SCOTT 3000 20
Elapsed: 00:00:00.00
12:50:06 SCOTT@ prod>select * from table(dbms_xplan.display_cursor(null,null,'advanced'));
PLAN_TABLE_OUTPUT
------------------------------------------------------------------------------------------------------
SQL_ID bqz9ujgnn4jzu, child number 0
-------------------------------------
select empno,ename,sal,deptno from emp where empno=7788
Plan hash value: 2949544139
--------------------------------------------------------------------------------------
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time |
--------------------------------------------------------------------------------------
| 0 | SELECT STATEMENT | | | | 2 (100)| |
| 1 | TABLE ACCESS BY INDEX ROWID| EMP | 1 | 46 | 2 (0)| 00:00:01 |
|* 2 | INDEX UNIQUE SCAN | PK_EMP | 1 | | 1 (0)| 00:00:01 |
--------------------------------------------------------------------------------------
Query Block Name / Object Alias (identified by operation id):
-------------------------------------------------------------
PLAN_TABLE_OUTPUT
------------------------------------------------------------------------------------------------------
1 - SEL$1 / EMP@SEL$1
2 - SEL$1 / EMP@SEL$1
Outline Data
-------------
/*+
BEGIN_OUTLINE_DATA
IGNORE_OPTIM_EMBEDDED_HINTS
OPTIMIZER_FEATURES_ENABLE('11.2.0.1')
DB_VERSION('11.2.0.1')
ALL_ROWS
OUTLINE_LEAF(@"SEL$1")
INDEX_RS_ASC(@"SEL$1" "EMP"@"SEL$1" ("EMP"."EMPNO"))
END_OUTLINE_DATA
*/
PLAN_TABLE_OUTPUT
------------------------------------------------------------------------------------------------------
Predicate Information (identified by operation id):
---------------------------------------------------
2 - access("EMPNO"=7788)
Column Projection Information (identified by operation id):
-----------------------------------------------------------
1 - "EMPNO"[NUMBER,22], "ENAME"[VARCHAR2,10], "SAL"[NUMBER,22],
"DEPTNO"[NUMBER,22]
2 - "EMP".ROWID[ROWID,10], "EMPNO"[NUMBER,22]
46 rows selected.
Elapsed: 00:00:00.06
12:50:21 SCOTT@ prod>
這種方法在 SQLPLUS中查看剛執(zhí)行過的 SQLSQLSQL的執(zhí)行計(jì)劃 。
-- dbms_xplan.display_cursor傳入的前兩個(gè)參數(shù)值均為 null,null第三個(gè)參數(shù)是 "advanced"第三個(gè)參 數(shù)也可以是 "all"得到的顯示結(jié)果，少了 "Outline data"部分的內(nèi)容 。
sql>select sql_text,sql_id,hash_value,child_number from v$sql
2* where sql_text like 'select empno,ename,sal%'
SQL_TEXT SQL_ID HASH_VALUE CHILD_NUMBER
-------------------------------------------------- ------------- ---------- ------------
select empno,ename,sal,deptno from emp where empno bqz9ujgnn4jzu 3913435130 0
=7788
Elapsed: 00:00:00.04
13:00:25 SCOTT@ prod>select * from table(dbms_xplan.display_cursor('bqz9ujgnn4jzu',0,'advanced'));
PLAN_TABLE_OUTPUT
------------------------------------------------------------------------------------------------------
SQL_ID bqz9ujgnn4jzu, child number 0
-------------------------------------
select empno,ename,sal,deptno from emp where empno=7788
Plan hash value: 2949544139
--------------------------------------------------------------------------------------
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time |
--------------------------------------------------------------------------------------
| 0 | SELECT STATEMENT | | | | 2 (100)| |
| 1 | TABLE ACCESS BY INDEX ROWID| EMP | 1 | 46 | 2 (0)| 00:00:01 |
|* 2 | INDEX UNIQUE SCAN | PK_EMP | 1 | | 1 (0)| 00:00:01 |
--------------------------------------------------------------------------------------
Query Block Name / Object Alias (identified by operation id):
-------------------------------------------------------------
PLAN_TABLE_OUTPUT
------------------------------------------------------------------------------------------------------
1 - SEL$1 / EMP@SEL$1
2 - SEL$1 / EMP@SEL$1
Outline Data
-------------
/*+
BEGIN_OUTLINE_DATA
IGNORE_OPTIM_EMBEDDED_HINTS
OPTIMIZER_FEATURES_ENABLE('11.2.0.1')
DB_VERSION('11.2.0.1')
ALL_ROWS
OUTLINE_LEAF(@"SEL$1")
INDEX_RS_ASC(@"SEL$1" "EMP"@"SEL$1" ("EMP"."EMPNO"))
END_OUTLINE_DATA
*/
PLAN_TABLE_OUTPUT
------------------------------------------------------------------------------------------------------
Predicate Information (identified by operation id):
---------------------------------------------------
2 - access("EMPNO"=7788)
Column Projection Information (identified by operation id):
-----------------------------------------------------------
1 - "EMPNO"[NUMBER,22], "ENAME"[VARCHAR2,10], "SAL"[NUMBER,22],
"DEPTNO"[NUMBER,22]
2 - "EMP".ROWID[ROWID,10], "EMPNO"[NUMBER,22]
46 rows selected.
Elapsed: 00:00:00.14
3、通過DBMS_XPLAN.display_awr
使用方法dbms_xplan.display_cursor能夠得到sql執(zhí)行計(jì)劃的前提條件是該SQL還在共享池中，而如果執(zhí)行計(jì)劃的前提條件是該SQL還在共享池中，而如果執(zhí)行計(jì)劃的前提條件是該 還在共享池中，而如果SQLSQLSQL的執(zhí)行計(jì)劃已經(jīng)被刷出共享池，那么只要該SQL的執(zhí)行計(jì)劃被ORACLE采集到 AWR Repository中， 就可以用該方法來查看 。
12:24:00 SCOTT@ prod>select empno,ename,sal,deptno from emp where empno=7788;
13:10:56 SYS@ prod>exec dbms_workload_repository.create_snapshot;
PL/SQL procedure successfully completed.
13:11:37 SYS@ prod>alter system flush shared_pool;
System altered.
Elapsed: 00:00:00.31
13:16:28 SYS@ prod>select * from table(dbms_xplan.display_cursor('bqz9ujgnn4jzu',0,'advanced'));
PLAN_TABLE_OUTPUT
------------------------------------------------------------------------------------------------------
SQL_ID: bqz9ujgnn4jzu, child number: 0 cannot be found
13:21:53 SYS@ prod>desc dbms_xplan
FUNCTION DISPLAY_AWR RETURNS DBMS_XPLAN_TYPE_TABLE
Argument Name Type In/Out Default?
------------------------------ ----------------------- ------ --------
SQL_ID VARCHAR2 IN
PLAN_HASH_VALUE NUMBER(38) IN DEFAULT
DB_ID NUMBER(38) IN DEFAULT
FORMAT VARCHAR2 IN DEFAULT
13:30:15 SCOTT@ prod>select * from table(dbms_xplan.display_awr('bqz9ujgnn4jzu'));
PLAN_TABLE_OUTPUT
------------------------------------------------------------------------------------------------------
SQL_ID bqz9ujgnn4jzu
--------------------
select empno,ename,sal,deptno from emp where empno=7788
Plan hash value: 2949544139
--------------------------------------------------------------------------------------
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time |
--------------------------------------------------------------------------------------
| 0 | SELECT STATEMENT | | | | 2 (100)| |
| 1 | TABLE ACCESS BY INDEX ROWID| EMP | 1 | 46 | 2 (0)| 00:00:01 |
| 2 | INDEX UNIQUE SCAN | PK_EMP | 1 | | 1 (0)| 00:00:01 |
--------------------------------------------------------------------------------------
14 rows selected.
Elapsed: 00:00:00.30
4、通過10046 事件查看
1）查看當(dāng)前session：
13:29:52 SYS@ prod>grant alter session to scott;
Grant succeeded.
13:44:31 SCOTT@ prod>alter session set events '10046 trace name context forever,level 12';
Session altered.
13:44:53 SCOTT@ prod>select empno,ename,sal,deptno from emp where empno=7788;
EMPNO ENAME SAL DEPTNO
---------- ---------- ---------- ----------
7788 SCOTT 3000 20
Elapsed: 00:00:00.10
13:45:51 SCOTT@ prod>alter session set events '10046 trace name context off';
Session altered.
Elapsed: 00:00:00.03
[oracle@rh7 ~]$ ls -lt /u01/app/oracle/diag/rdbms/prod/prod/trace/|more
total 1256
-rw-r----- 1 oracle oinstall 27801 May 16 13:46 prod_ora_4995.trc
-rw-r----- 1 oracle oinstall 177 May 16 13:46 prod_ora_4995.trm
-rw-r----- 1 oracle oinstall 1122 May 16 13:34 prod_j000_5188.trc
-rw-r----- 1 oracle oinstall 59 May 16 13:34 prod_j000_5188.trm
......
[oracle@rh7 ~]$ tkprof /u01/app/oracle/diag/rdbms/prod/prod/trace/prod_ora_4995.trc /home/oracle/emp_0416.txt sys=no
TKPROF: Release 11.2.0.1.0 - Development on Fri May 16 13:47:41 2014
Copyright (c) 1982, 2009, Oracle and/or its affiliates. All rights reserved.
[oracle@rh7 ~]$ cat emp_0416.txt
SQL ID: bqz9ujgnn4jzu
Plan Hash: 2949544139
select empno,ename,sal,deptno
from
emp where empno=7788
call count cpu elapsed disk query current rows
------- ------ -------- ---------- ---------- ---------- ---------- ----------
Parse 1 0.07 0.09 1 66 0 0
Execute 1 0.00 0.00 0 0 0 0
Fetch 2 0.00 0.00 0 2 0 1
------- ------ -------- ---------- ---------- ---------- ---------- ----------
total 4 0.07 0.09 1 68 0 1
Misses in library cache during parse: 1
Optimizer mode: ALL_ROWS
Parsing user id: 84
Rows Row Source Operation
------- ---------------------------------------------------
1 TABLE ACCESS BY INDEX ROWID EMP (cr=2 pr=0 pw=0 time=0 us cost=2 size=46 card=1)
1 INDEX UNIQUE SCAN PK_EMP (cr=1 pr=0 pw=0 time=0 us cost=1 size=0 card=1)(object id 73202)
Elapsed times include waiting on following events:
Event waited on Times Max. Wait Total Waited
---------------------------------------- Waited ---------- ------------
db file sequential read 1 0.00 0.00
SQL*Net message to client 2 0.00 0.00
SQL*Net message from client 2 19.13 19.13
********************************************************************************
2）查看其它session：
14:12:23 SYS@ prod>select sid,serial#,username from v$session where username is not null;
SID SERIAL# USERNAME
---------- ---------- ------------------------------
1 5 SYS
42 9SCOTT
6 rows selected.
Elapsed: 00:00:00.10
14:12:47 SYS@ prod>desc dbms_monitor
PROCEDURE SESSION_TRACE_DISABLE
Argument Name Type In/Out Default?
------------------------------ ----------------------- ------ --------
SESSION_ID BINARY_INTEGER IN DEFAULT
SERIAL_NUM BINARY_INTEGER IN DEFAULT
PROCEDURE SESSION_TRACE_ENABLE
Argument Name Type In/Out Default?
------------------------------ ----------------------- ------ --------
SESSION_ID BINARY_INTEGER IN DEFAULT
SERIAL_NUM BINARY_INTEGER IN DEFAULT
WAITS BOOLEAN IN DEFAULT
BINDS BOOLEAN IN DEFAULT
PLAN_STAT VARCHAR2 IN DEFAULT
14:13:11 SCOTT@ prod>select sid from v$mystat where rownum=1;
SID
----------
42
14:13:41 SYS@ prod>exec dbms_monitor.SESSION_TRACE_ENABLE(42,9,waits=>true,binds=>true);
PL/SQL procedure successfully completed.
Elapsed: 00:00:00.10
14:13:25 SCOTT@ prod>select empno,ename,sal,deptno from emp where empno=7369;
EMPNO ENAME SAL DEPTNO
---------- ---------- ---------- ----------
7369 SMITH 800 20
Elapsed: 00:00:00.03
14:14:29 SYS@ prod>exec dbms_monitor.SESSION_TRACE_disable(42,9);
PL/SQL procedure successfully completed.
Elapsed: 00:00:00.02
[oracle@rh7 ~]$ cat emp_0416.txt
SQL ID: fyydvbdw2uq6q
Plan Hash: 2949544139
select empno,ename,sal,deptno
from
emp where empno=7369
call count cpu elapsed disk query current rows
------- ------ -------- ---------- ---------- ---------- ---------- ----------
Parse 1 0.00 0.00 0 0 0 0
Execute 1 0.00 0.00 0 0 0 0
Fetch 2 0.00 0.00 0 2 0 1
------- ------ -------- ---------- ---------- ---------- ---------- ----------
total 4 0.00 0.00 0 2 0 1
Misses in library cache during parse: 1
Optimizer mode: ALL_ROWS
Parsing user id: 84
Rows Row Source Operation
------- ---------------------------------------------------
1 TABLE ACCESS BY INDEX ROWID EMP (cr=2 pr=0 pw=0 time=0 us cost=2 size=46 card=1)
1 INDEX UNIQUE SCAN PK_EMP (cr=1 pr=0 pw=0 time=0 us cost=1 size=0 card=1)(object id 73202)
Elapsed times include waiting on following events:
Event waited on Times Max. Wait Total Waited
---------------------------------------- Waited ---------- ------------
SQL*Net message to client 2 0.00 0.00
SQL*Net message from client 1 0.00 0.00
5、通過autotrace查看
SET AUTOTRACE ON
SET AUTOTRACE TRACEONLY
SET AUTOTRACE TRACEONLY EXPLAIN
--使用SET AUTOTRACE ON和SET AUTOTRACE TRACEONLY時(shí)，目標(biāo)SQL已經(jīng)被執(zhí)行過，所以在SET AUTOTRACE ON和SET AUTOTRACE TRACEONLY 的情況下能看到目標(biāo)SQL
的實(shí)際消耗情況。
--使用SET AUTOTRACE TRACEONLY EXPLAIN時(shí)，如果執(zhí)行的是SELECT語句，則該SQL并沒有被執(zhí)行，但如果執(zhí)行的是DML語句，情況就不一樣了，此時(shí)的DML語句是會(huì)
被ORACLE執(zhí)行的。
--需要特別說明的是，雖然使用SET AUTOTRACE命令所得到的執(zhí)行計(jì)劃可能是不準(zhǔn)確的，因?yàn)镾ET AUTOTRACE命令所顯示的執(zhí)行計(jì)劃都是源自于explain plan 命令。
案例：
15:32:11 SYS@ prod>conn scott/tiger
Connected.
15:32:17 SCOTT@ prod>set autotrace on
15:32:21 SCOTT@ prod>select empno,ename,sal,deptno from emp where empno=7788;
EMPNO ENAME SAL DEPTNO
---------- ---------- ---------- ----------
7788 SCOTT 3000 20
Elapsed: 00:00:00.03
Execution Plan
----------------------------------------------------------
Plan hash value: 2949544139
--------------------------------------------------------------------------------------
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time |
--------------------------------------------------------------------------------------
| 0 | SELECT STATEMENT | | 1 | 46 | 2 (0)| 00:00:01 |
| 1 | TABLE ACCESS BY INDEX ROWID| EMP | 1 | 46 | 2 (0)| 00:00:01 |
|* 2 | INDEX UNIQUE SCAN | PK_EMP | 1 | | 1 (0)| 00:00:01 |
--------------------------------------------------------------------------------------
Predicate Information (identified by operation id):
---------------------------------------------------
2 - access("EMPNO"=7788)
Statistics
----------------------------------------------------------
168 recursive calls
0 db block gets
38 consistent gets
0 physical reads
0 redo size
736 bytes sent via SQL*Net to client
523 bytes received via SQL*Net from client
2 SQL*Net roundtrips to/from client
5 sorts (memory)
0 sorts (disk)
1 rows processed
15:32:26 SCOTT@ prod>set autotrace trace
15:32:49 SCOTT@ prod>select empno,ename,sal,deptno from emp where empno=7788;
Elapsed: 00:00:00.02
Execution Plan
----------------------------------------------------------
Plan hash value: 2949544139
--------------------------------------------------------------------------------------
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time |
--------------------------------------------------------------------------------------
| 0 | SELECT STATEMENT | | 1 | 46 | 2 (0)| 00:00:01 |
| 1 | TABLE ACCESS BY INDEX ROWID| EMP | 1 | 46 | 2 (0)| 00:00:01 |
|* 2 | INDEX UNIQUE SCAN | PK_EMP | 1 | | 1 (0)| 00:00:01 |
--------------------------------------------------------------------------------------
Predicate Information (identified by operation id):
---------------------------------------------------
2 - access("EMPNO"=7788)
Statistics
----------------------------------------------------------
0 recursive calls
0 db block gets
2 consistent gets
0 physical reads
0 redo size
736 bytes sent via SQL*Net to client
523 bytes received via SQL*Net from client
2 SQL*Net roundtrips to/from client
0 sorts (memory)
0 sorts (disk)
1 rows processed
15:34:59 SCOTT@ prod>set autotrace on exp
15:35:04 SCOTT@ prod>select empno,ename,sal,deptno from emp where empno=7788;
EMPNO ENAME SAL DEPTNO
---------- ---------- ---------- ----------
7788 SCOTT 3000 20
Elapsed: 00:00:00.02
Execution Plan
----------------------------------------------------------
Plan hash value: 2949544139
--------------------------------------------------------------------------------------
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time |
--------------------------------------------------------------------------------------
| 0 | SELECT STATEMENT | | 1 | 46 | 2 (0)| 00:00:01 |
| 1 | TABLE ACCESS BY INDEX ROWID| EMP | 1 | 46 | 2 (0)| 00:00:01 |
|* 2 | INDEX UNIQUE SCAN | PK_EMP | 1 | | 1 (0)| 00:00:01 |
--------------------------------------------------------------------------------------
Predicate Information (identified by operation id):
---------------------------------------------------
2 - access("EMPNO"=7788)
15:35:12 SCOTT@ prod>set autotrace on statis
15:35:20 SCOTT@ prod>select empno,ename,sal,deptno from emp where empno=7788;
EMPNO ENAME SAL DEPTNO
---------- ---------- ---------- ----------
7788 SCOTT 3000 20
Elapsed: 00:00:00.03
Statistics
----------------------------------------------------------
0 recursive calls
0 db block gets
2 consistent gets
0 physical reads
0 redo size
736 bytes sent via SQL*Net to client
523 bytes received via SQL*Net from client
2 SQL*Net roundtrips to/from client
0 sorts (memory)
0 sorts (disk)
1 rows processed
15:35:26 SCOTT@ prod>
@至此，Oracle下查看SQL執(zhí)行計(jì)劃的幾種方式介紹完畢，大家可根據(jù)自己的愛好來使用！
新聞名稱：Oracle查看SQL執(zhí)行計(jì)劃的方式
網(wǎng)站網(wǎng)址：http://aaarwkj.com/article22/iijpjc.html
成都網(wǎng)站建設(shè)公司_創(chuàng)新互聯(lián)，為您提供網(wǎng)站維護(hù)、微信小程序、網(wǎng)站內(nèi)鏈、品牌網(wǎng)站制作、App設(shè)計(jì)、建站公司
聲明：本網(wǎng)站發(fā)布的內(nèi)容（圖片、視頻和文字）以用戶投稿、用戶轉(zhuǎn)載內(nèi)容為主，如果涉及侵權(quán)請(qǐng)盡快告知，我們將會(huì)在第一時(shí)間刪除。文章觀點(diǎn)不代表本網(wǎng)站立場(chǎng)，如需處理請(qǐng)聯(lián)系客服。電話：028-86922220；郵箱：631063699@qq.com。內(nèi)容未經(jīng)允許不得轉(zhuǎn)載，或轉(zhuǎn)載時(shí)需注明來源： 創(chuàng)新互聯(lián)
- 重慶企業(yè)手機(jī)網(wǎng)站建設(shè) 2021-01-03
- 手機(jī)網(wǎng)站建設(shè)需要注意的地方 2016-10-04
- 手機(jī)網(wǎng)站設(shè)計(jì)不容忽視 2016-11-06
- 企業(yè)選擇手機(jī)網(wǎng)站建設(shè)的幾點(diǎn)重要作用 2022-05-22
- 手機(jī)響應(yīng)式網(wǎng)站布局很重要 2014-06-10
- 企業(yè)為什么要做手機(jī)網(wǎng)站？手機(jī)網(wǎng)站建設(shè)的必要性 2022-11-19
- 手機(jī)網(wǎng)站設(shè)計(jì)怎么做才能有吸引力？ 2016-09-05
- 制作手機(jī)網(wǎng)站要注重哪些核心因素 2016-08-08
- 手機(jī)網(wǎng)站建設(shè)越來越火的原因 2017-01-17
- 手機(jī)網(wǎng)站建設(shè)需要注意的問題有哪些 2021-08-26
- 網(wǎng)站設(shè)計(jì)中響應(yīng)式網(wǎng)站與手機(jī)網(wǎng)站有什么區(qū)別？ 2016-10-28
- 企業(yè)做網(wǎng)站有什么用途？ 2022-06-23