PHP + MYSQLI: Variable parameter/result binding with prepared statements In a project that I'm about to wrap up, I've written and implemented an object-relational mapping solution for PHP. Before the doubters and dreamers cry out "how on earth?", relax -- I haven't found a way to make late static binding work -- I'm just working around it in the best way that I possibly can. Anyway, I'm not currently using prepared statements for querying, because I couldn't come up with a way to

How Big can a MySQL database get before performance starts to Degrade At what point does a MySQL database start to lose performance? Does physical database size matter? Do number of records matter? Is any performance degradation linear or exponential? I have what I believe to be a large database, with roughly 15M records which take up almost 2GB. Based on these numbers, is there any incentive for me to clean the data out, or am I safe to allow it to continue

Auto Generate Database Diagram MySQL I'm tired of opening Dia and creating a database diagram at the beginning of every project. Is there a tool out there that will let me select specific tables and then create a database diagram for me based on a MySQL database? Preferably it would allow me to edit the diagram afterward since none of the foreign keys are set... Here is what I am picturing diagram-wise (please excuse the horrible data design, I didn't design it. Let's

Multiple Updates in MySQL I know that you can insert multiple rows at once, is there a way to update multiple rows at once (as in, in one query) in MySQL? Edit: For example I have the following Name id Col1 Col2 Row1 1 6 1 Row2 2 2 3 Row3 3 9 5 Row4 4 16 8 I want to combine all the following Updates into one query UPDATE table SET Col1 = 1 WHERE id = 1; UPDATE table SET Col1

How do I Retrieve my MySQL Username and Password? I lost my MySQL username and password. How do I retrieve it? Answer :       Stop the MySQL process.      Start the MySQL process with the --skip-grant-tables option.      Start the MySQL console client with the -u root option. List all the users; SELECT * FROM mysql.user; Reset password; UPDATE mysql.user SET Password=PASSWORD('[password]') WHERE User='[username]'; But DO NOT FORGET to      Stop the MySQL process      Start the MySQL Process normally

Throw an error in a MySQL Trigger If I have a trigger before the update on a table, how can I throw an error that prevents the update on that table? Solution :  Here is one hack that may work. It isn't clean, but it looks like it might work: Essentially, you just try to update a column that doesn't exist.

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