Martijn Tonies wrote:
The notion of a variant record exists in many programming languages.
Typically you have a selector to indicate which variant it is. There is
nothing at all wrong with using the same sort of construct in a database
table.
http://en.wikipedia.org/wiki/Variant_record
I'm running replication between two MySQL servers. This has been working
fine for a while; howver, as of yesterday replication keeps failing because
of a lock wait timeout exceeded on one of my tables.
I thought I could use the mysqlbinlog utility to figure out what queries
were being executed
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I'm new with MySQL server 5.0 ,I tried to create a table MemberDetails from
the mysql command shell,
I got an error 1064 (42000): *You have an error in your SQL syntax*;
Here is my code:
mysql CREATE TABLE memberDetails
- *(*
-memberId INT NOT NULL AUTO_INCREMENT,
-
mysql CREATE TABLE memberDetails
- *(*
-memberId INT NOT NULL AUTO_INCREMENT,
-PRIMARY KEY(memberId),
-first_name varchar(100),
-last_name varchar(100),
-Email varchar(60),
-phoneNum varchar(25)
- *);*
Works without the
I see that you've already decided on 64-bit anyway, but here's a more
explicit reason to do so: in 32-bit (PAE-mode), no single process can
allocate more than 4GB of memory- that's all the address space there
is. The *system* can see it all, but each process can only work with a
single 4GB chunk
I don't have any links, but in general we don't do very much as far as
tuning is concerned.
Here's a few things I can think of off the top of my head that we
sometimes do if we're worried about performance:
blockdev --setra 2048 /dev/sda (substitute an appropriate readahead
amount and device
On Sat, Nov 15, 2008 at 3:54 AM, metastable [EMAIL PROTECTED]
wrote:
I may just have had an insight over my morning coffee.
How about turning things around and adding a FK -to the customers table-
on each of the customer type tables (companies, people, charities, etc) ?
The customers table
Yeah, so a UNION would work, would this solution be faster than using
a subquery (my instinct says yes) but thought I would ask. They both
execute fast on my system so it's hard to say under load.
Thanks,
Waynn
On 11/12/08, Dan Nelson [EMAIL PROTECTED] wrote:
In the last episode (Nov 12), Waynn
