version 5.5 is the current version -- PLEASE READ THIS IF YOU'RE NOT ON 5.0 YET
Discuss version 5.5 is the current version -- PLEASE READ THIS IF YOU'RE NOT ON 5.0 YET in the MySQL Help forum on Dev Shed. version 5.5 is the current version -- PLEASE READ THIS IF YOU'RE NOT ON 5.0 YET MySQL Help forum discussing administration, SQL syntax, and other MySQL-related topics. MySQL is an open-source relational database management system (RDBMS).
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version 5.5 is the current version -- PLEASE READ THIS IF YOU'RE NOT ON 5.0 YET
mysql version 4.1 has been in production status since october, 2004
if you're not on 4.1 yet, and you post a problem and wish to receive a solution involving sql, it is your responsibility to mention which version you're on
otherwise, you might get a solution using sql that works only in 4.1
deal?
EDIT: we've updated the thread to reflect that 5.5 is current, and you shouldn't post a question without mentioning your version if your version is below 5.0
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My favorite is the unicode support and how it was implemented. I just can't understand why data types like NCHAR, NVARCHAR, etc. exist after I see how MySQL did it. I'm sure there are reasons, I just can't conceive them right now. Oh well.
Oh, and the subqueries are especially nice when you're migrating from one DBMS to MySQL.
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blockcipher
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Gratuitously stolen...
mysql> SELECT * FROM user WHERE clue > 0;
0 Results Returned.
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I like how easy it is to set character sets when creating tables. Made it very easy to add support for UTF-8, Shift_JS, Big5, etc to my program, so long as you also use the same character set for htmlentitites() (when using PHP, obviously).
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Quote:
Originally Posted by Sepodati
I like how easy it is to set character sets when creating tables. Made it very easy to add support for UTF-8, Shift_JS, Big5, etc to my program, so long as you also use the same character set for htmlentitites() (when using PHP, obviously).
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My main interest in version 5.0 is speed the improvements made to SELECT queries using OR.
Quote:
No matter which index MySQL selects, it has to perform a full table scan to satisfy the other condition. Queries using OR conditions prevent MySQL from easily eliminating candidate rows. So rather than use one index to find some of the rows and then perform the table scan, MySQL decides that it's faster to simply use a table scan. This is slated to be fixed in MySQL 5.0.
- O'Reilly High Performance MySQL
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Ive recently upgraded from Mysql 4.1 to 5, and found very little problems with the change. The only real problem i found was that i had the odd field that was named on a reserve word in 5 but not in 4.1, so some queries broke.
Other than that, make sure you back your data up and do a table check after the upgrade.
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Note that the above (5.2.x) and 5.1.x, are still Beta and are not recommended for Production use. For production, you should use the latest stable release of 5.0, which for the community is 5.0.41: