I may help you to execute your query in less than 20mn.
Question : count(*) from EMP = ?
Mathias
-Original Message-
From: Peter Brawley [mailto:[EMAIL PROTECTED]
Sent: dimanche 24 avril 2005 17:39
To: [EMAIL PROTECTED]
Cc: mysql@lists.mysql.com
Subject: Re: mysql_performance
Moemen,
You a
Moemen,
You assign a string _position_ result from LOCATE to a SUBSTRNG _length_
argument. Is that what you mean?
Do you have indexes on persons.item_id, emp (item_id, item_type, f2, f6,
f7)? Once there are such indexes, try ordering the WHERE ... ANDs to
correspond to those keys so the optimis
Dear all,
I have a problem running this query
"select distinct T1.item_id, T1.f2 from Persons as T1 , Emp as
T2 , Emp as T3 where T1.item_type='6.' and T2.item_type='6.1.9.'
and
T3.item_type='6.1.' and T2.f2 like '1.1.16.%' and
substring(T2.item_id,1,LOCATE('.',T2.item_id))=T1.item_id a
