使用DBMS_SQLTUNE优化SQL

--创建优化任务

DECLARE

my_task_name VARCHAR2 (30);

my_sqltext CLOB;

BEGIN

my_sqltext := 'select * from test_tune t where t.owner=''SCOTT''';

my_task_name := dbms_sqltune.create_tuning_task (

sql_text=> my_sqltext,

user_name => 'LEE',

scope => 'COMPREHENSIVE',

time_limit => 60,

task_name =>'sql_tuning_test',

description => 'Tuning Task'

);

END;
/

--执行优化任务
exec dbms_sqltune.execute_tuning_task('sql_tuning_test');

--查看任务状态
SELECT status FROM USER_ADVISOR_TASKS WHERE task_name = 'sql_tuning_test';

--查看优化结果

SET LONG 999999

SET SERVEROUTPUT ON SIZE 999999
SET LINESIZE 100

SELECT DBMS_SQLTUNE.REPORT_TUNING_TASK('sql_tuning_test') FROM DUAL;

--删除优化任务

exec dbms_sqltune.drop_tuning_task('sql_tuning_test');