mos wrote:
I have a simple query in MySQL 5.0.24:
insert into table1 (col1) select distinct col1 from bigtable;
that will run for 1:14:18. Both tables are MyISAM and table1 was just
created with 2 columns and is empty.
The "select distinct col1 from bigtable" takes only 2 minutes to run
if I run it by itself (without the Insert statement), so why does
inserting it into Table1 take over an hour? This worked fine under
MySQL 4.1.10
BigTable has 30 million rows in it and will return approx 7000
distinct values.
TIA
Mike
are your tables indexed? is col1 a primary key? have a look at
optimising the table
HTH
--
MySQL General Mailing List
For list archives: http://lists.mysql.com/mysql
To unsubscribe: http://lists.mysql.com/[EMAIL PROTECTED]
