Prevent Writes

Simultaneous Writes
I have two system doing database writes to a third system where mysql resides. I only get the writes from the system that connects first.

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Does Updating Id=LAST_INSERT_ID(id) Cause Writes?
Does MySQL avoid updating id in "id=LAST_INSERT_ID(id)"? Or to avoid an update I need to get id from SELECT, then INSERT if the row doesn't exist (and hope that keys are still cached to avoid disk I/O)?

I'm adding over 100 million rows where there may be more than 10 million inserts a day. There's an entity table that I need to insert new entries into. LOAD DATA may not be possible as data is accessed through a remote database over the network. Code:

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Flushing Writes On Slave Db
i need to make a slave database "READ" only.ie, it must not not respond to data manipulation commands. i want only "select * from table_name" command to work on the tables in the replicated db on the slave. How must i go about it?

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Verifying Mysql Writes (perl)
What is a proper way of verifying that a mysql write was successfull,
and to retry if it wasnt?

In my perl script I add records through:

my $dbh=DBI->connect($dsn, $db_user_name, $db_password);
my $sth=$dbh->prepare("insert into TABLE (X, Y, Z) values ('1', '2',
'3')");
$sth->execute;
$sth->finish;

I have noticed that from time to time this fails, due to limitations
of my webhost. I thus want to do a check after the write, that it
actually happened, and if not redo.

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Prevent MySQL Locking Up
I was doing some major work using MySQL this weekend, and I realized that MySQL is quite fragile. I mean, it can lock up so easily, and it's not funny. How can you prevent MySQL from locking up? What things can we really do so that MySQL doesn't lock up the entire server so easily?

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Prevent ON UPDATE CURRENT_TIMESTAMP
Does anybody know if there is a way to prevent an ON UPDATE CURRENT_TIMESTAMP from occuring if I don't want it to?
Only way I can see to do it is by altering the column properties to just a TIMESTAMP field, do the update, then alter the column back.

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How To Prevent Stop Words In A MATCH - AGAINST?
I have a simple search engine for my website, and the MATCH-AGAINST works well when search english words (contained in the `name` and `desc` columns), but when try to search a item-code contained in the `sku` column it seems like mysql handle that code (such as "hp-504") as a stop word and returns zero rows...

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Prevent Users Creating Their Own Databases
I've installed 4.0.22 and phpMyAdmin 2.6.0-pl2 and followed the instructions, removed the "guest" accounts. Granted users ALL privs on their own db only, which I created. Globally users just have the USAGE priv, no create priv but users can still create their own databases which I need to prevent. What am I missing ?

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Prevent One Field Form Overlaping Another
I have the following table:

lesson {
id int,
lesson_start int,
lesson_end int,

PRIMARY KEY(id)
}

No lesson can overlap another. So I can't have rows like:

id | lesson_start | lesson_end
1 | 12:00 | 14:00
2 | 13:00 | 15:00

Is there any way to deal with it from the MySQL level?

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Prevent MySQL From Starting At Startup
I'm starting to play around with MySQL. How can I prevent it from starting up whenever my computer starts? It slows down the startup some, and I'm not always wanting to use it. besides, I can start it myself if I need it.I've had a look on Google for theis, and found quite a few results, but they were fo Linux or Unix. I'm ruinning Windows XP.

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Prevent Multiple User Registrations
What's the best way to prevent someone from registering multiple accounts on my website? Should I create a column called "IP Address" in the members table and make it UNIQUE? Are there any complications with this?

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MySql Help - Need To Prevent The Duplication Of Information When Inserting To DB
Im am doing the web-based application, where I have to add some information from front-end, and then add it to the database. Now, I would like to get the MySQL statement that will prevent me from adding same thing in 1 table.

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How To Prevent MySQL Queries From Taking Too Long
I have a very busy database with some tables having hundreds of thousands of records. I am running MySQL 5.0.16 on Windows. Some of the queries running on my database are not fined-tuned enough, and need improvement. However, the system is live in production and I am looking for a way to prevent MYSQL from committing Harakiri, i.e. from running very slow queries forever, taking the cpu to 50% and beyond for hours. My scripting language is PHP. I found that after a while the end user receives a timeout on the browser, but MySQL continues trying to run the query, sometimes for hours.
My question is, is there a way to specify a timeout for MySQL so that it will abort any queries that it is running that have not returned a result by then. The end user is no longer around anyway, so I am looking for a way to protect the database resources (and in parallel I will start investigating how to optimize the slow queries).

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How To Prevent INSERT On Duplicate Rows With 30 Fields
I have a MySQL table with about 30 fields. I am inserting new data, and want to be sure that there are no duplicate rows. A duplicate row would be one with ALL the 30 fields (except the auto-increment index) exactly the same. How do I do that efficiently?

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Prevent Copying From Mysql Data Tables ?
Recently we had to move some of our databases to the clients site onto their linux server.

Can someone hint on how to prevent "the clients" from snatching our data and db schema? The drawback: they do own the machine - hence they do have a root password, therefore even if I change the unix permissions on the mysql directories - they are still open to the "root".

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How Do I Prevent "too Many Keys Specified" ?
I keep getting the "too many keys specified" error. I am the admin of mysql and the database that i am trying to run a query in. Which file do i have to edit to prevent this, or is there another query that i must run.

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