Tuning Data

Question

Anyone,, please help me... I have one problem..
In my Database, I have 260,000,000 records..
Then, I execute this query :
Select name, gender, phone, address ,bla bla bla from table_name
where name like '%sa%'
and gender = 'male'
and mother's_name like '%san%' ;
It needs about 1 minute 5 seconds...
Can anyone tell me, how to tune it, so i can execute it under 1 minute..
thx
best regard,
Sandi

Answer 1

Dear
SELECT NAME, gender, phone, address
  FROM table_name
WHERE NAME LIKE '%sa%'
AND gender = 'male'
AND mothers_name LIKE '%san%';You should always give more information about your query, your table, your indexes and your Oracle release in order for others to be able to give you a hand on tuning your query
Could you please post the explain plan of your query. The best thing you could do to post your explain plan is to execute your query as follows
SELECT /*+ gather_plan_statistics */
     NAME, gender, phone, address
  FROM table_name
WHERE NAME LIKE '%sa%'
AND gender = 'male'
AND mothers_name LIKE '%san%';and then immediately after your query has completed do this
select * from table (dbms_xplan.display_cursor(null,null,'ALLSTATS LAST'));and post here the formated explain plan generated by the above select. Please use the tag when posting your explain plan as follows
Having said this, it might be very possible that you need to have an index starting with the column gender
Mohamed Houri