MYSQL :: Selecting Correct Versions Of MySQL

Selecting The Correct Row In A Table Which Records Changes
I have an "employees" table which records which department each employee has worked in, and the date that each employee started working in their departments. Since it is possible for an employee to change departments, a single employee can have several records in this table. For example, consider the following history for Employee 42:
1. On Jan. 15, 2007, Employee 42 is hired to work in Department 21
2. On Feb. 1, 2007, Employee 42 changes departments to Department 5
3. On Feb. 14, 2007, Employee 42 changes departmets to Department 22
4. On Mar. 3, 2007, Employee 42 changes departments to Department 18

Then, Employee 42's records in the "employees" table would look like this:
CODEselect * from employees where employee_id = 42;

Benchmarks Of Runtime Versions Of Mysql Or Other Sql Versions Sqlite Hsqldb
mysql vs sqlite vs hsql

First of all i'm on a win32 platform using java. I also have mysql
installed. My question isabout benchmarks and multiple inserts &
selects
SQLITE: http://www.sqlite.org/
HSQL: http://hsqldb.sourceforge.net
I current have a mysql database of approx. 80mb.
Each day I Insert approx .5mb of new records into this table,
and I might also run mutiple Update, Delete, and Select queries as
well.
I'm trying to get an idea of how fast a sql database engine will run
given that is is inside of the JVM. I know it's going to be slower
than a db engine written in C and that's a trade off for being
portable to different operating systems.
What I want to know is how much of a trade off though - I don't want
to have to wait 10 mins or deal with screen freezing... Right
now on a windows platform using mysql things move really fast.
Can anyone give me an idea of the time delay needed to do these
Inserts in HSQL (ie: how much does the jvm slow things down)..
Thanks in advance

Min Returns Correct Min Value, But Not Correct Row
select min(time_to_sec(bests.time)) as aggregate_value, * from bests left join events on bests.event_id = events.id where fid = 13463 group by bests.event_id

if i query that i get the correct min value as "aggregate_value" but everything else is for a random row (presumably the first row as ordered by id asc). is this the correct functionality of mysql?

MySQL Versions
I am using MySQL 5 on my computer but the web-hotel I am contemplating to use only use MySQL 4.0xx. Can I use the database without modifying it? Or do I need to "convert" (downgrade) it for MySQL 4.0xx? If so, how do I do that?

Running Two MySQL Versions
Actually what I want to do is remove 4.1 because I downloaded 5.0 and installed w/o removing the previous version. I now have port 3307 for 5.0. Is this a problem and how can I change it back to 3306 so e.g. when I use Apache/PHP evrything works?

Two Versions Of Mysql On Same Unix Box
I have mysql 3.23.58 version running on my unix box. I installed a new application on it which need mysql version > 4.0 so I thought of having two mysql versions running on the same unix box. I have first installation in /usr/local/mysql and I untared the new version in /var/local/mysql-standard-4.1.18-pc-linux-gnu-i686-glibc23.

I am following instructions given in http://dev.mysql.com/doc/refman/4.1/en/multiple-servers.html I also created a empty file and named it as mysql.sock.new and stored it in /var/local. When I try to start this new version from /var/local/mysql-standard-4.1.18-pc-linux-gnu-i686-glibc23 using ./bin/mysqld_safe --datadir=/var/local/mysql-standard-4.1.18-pc-linux-gnu-i686-glibc23/data & it says "A mysqld process already exists". Please tell me where I am going wrong and how to configure it properly?

Row Select In Old Mysql Versions
We are using MySQL version 4.0.20-standard.

Our application requires a query to do a row select. From what I have found this version does not support rownum. We are unable to update the version of MySQL. Can anyone give us some support.

Running Two MySQL Versions
It seems that my computer is running two different mysql versions. When I'm trying to login to the database it refuse my password and giving me access to the test configuration. This is what i get in the event viewer.

Do you already have another mysqld server running on port: 3306 ?
Event id 100.

The problem occur when I changed my password for the database. I have turned off Mysql in local services but i think that that's the original version. When I start the xampp i think it starts the winmysqladmin version (not sure). How do I reconfigure the hole thing and how can I see what's running on my machine.

I actually have another question to. I'm trying to run and open the shell mysqladmin which doesn't work. It's just a flash, which one of them am I supposed to run?? You have several options like mysqladmin, mysql, mysqld, mysqld-nt....etc. I opened the winmyslqadmin which i think wasn't that good.

Downgrade MySQL Versions
I need to move a MySQL database created with MySQL 4.1.22 on PHP 5.2.3 to a different server with MySQL 3.23.58 on PHP 4.3.8.
Is it possible to convert the database to do this?
Alternatively, is there a way to export from the newer version in a format that the older version will accept?

Can Run Two Versions Of MySQL In Windows 2000?
I have been running 4.0.13 for several weeks now and though I'd like to =
test 4.1.0. 4.0.13 is under c:MySQL. I downloaded 4.1.0 under c:4.1 =
AlphaMySQL. When I try to launch mysql it brings me to the old =
version, how do I access the new one without killing the old one? (I =
have also tried putting 4.1.0 on a totally different machine and linking =
to it also.)

Previous Versions Of MySQL With XAMMP
I've downloaded XAMPP for Linux 1.5.1 for use on Fedora Core 4. I notice it only has the latest version of MySQL on it. I'm working on two web sites (for different clients) and they are hosted on different shared Linux hosting servers (with PHP), each with different versions of MySQL available, i.e:

MySQL 4.0.25-standard
MySQL 3.23.52

Is it possible for me to use older versions of MySQL with XAMPP? Could I just turn off MySQL in XAMMP and just run and older version of MySQL independently of XAMMP? If I can then how would I install multiple versions of MySQL in Fedora Core 4?

Symlinking Between Different Serveurs And MySQL Versions
I have a hosted server where we have both web and intranet share a same database. For interne reasons we need to migrate the intranet onto one of our servers and keep the web on the hosted server.

We will thus have the database splited in two. Our intern server willl have MySQL5 and our hosted one will remain with MySQL3.23.39 at list for a while longer.

I would like your advises on the faisability of using symlinking to access the tables on the hosted server from our intern server, knowing that MySQL version are different. The tables on the hosted side are MyISAM.

The main idea is to avoiding using replication to access comon tables on remote servers.

Utility To Convert Between MySQL Versions?
My webhost downgraded from mysql 5 to 4 and I'm seeing errors in the forum I was running. All I can see that would have changed and given me this database error would have been this downgrade. Is there a conversion utility availaible that can change back and forth between MySQL versions? I've looked around for about an hour thru Google and on this forum, but I haven't found anything yet.

I was getting password errors, but we seem to have resolved that issue, and now I'm left with this database connection error.

Thanks for any assistance!

P.S. The errors I get are:

Warning: mysql_error(): supplied argument is not a valid MySQL-Link resource in /home/clanloc/public_html/forum-old/db/mysql4.php on line 330

Warning: mysql_errno(): supplied argument is not a valid MySQL-Link resource in /home/clanloc/public_html/forum-old/db/mysql4.php on line 331
phpBB : Critical Error

Could not connect to the database

Trouble With NATURAL JOIN Between MySQL Versions
I have this query which works perfectly well in MySQL 5, but doesn't work in 4.1.
I know there were some changes made to join syntax between the versions but for the life of me I can't figure out exactly what I need to do to fix it:

SELECT Status, UserName, FontName, FontPath
FROM AccountInfo
NATURAL JOIN AccountPrefs, Templates.Fonts
WHERE AccountPrefs.HeaderFont = Fonts.FontID
AND UserID = '$userID'
works fine in v5, but in v4.1 I get the old "Column 'UserID' in where clause is ambiguous".
I'm trying to match the UserID in AccountInfo and AccountPrefs, I just left the font thing in there as well because I'm not sure if it's contributing to the problem.

Alternative To Group_concat For Early Versions Of Mysql
Is there an alternative to group concat, if you are using a lower version of mysql. If any one has any ideas it would be great, currently my code (thanks to some one from these forums) looks like this.

SELECT c.clientID, group_concat(ci.interestID) as interests
FROM Clients AS c
JOIN ClientInterests AS ci ON c.clientID = ci.clientID
GROUP BY c.clientID
HAVING find_in_set(1, interests)
AND find_in_set(3, interests)

Is there any way of doing this on a lower version of mysql?
Is it possible to wirte a function similar to group_concat?

How To Detect If Different Mysql Versions Are Installed/runing
from my InnoSetup setup :) I need to detect if any version of mysql is runing on my windows. Others sugested to check fo a mutex or a Class Name(dont know what are these) or Windows Names or Look for a mysql*.exe, so is there something common for mysql starting with v3 .. v5? I mean what is the thing that i have to search for, to know at least if mysql is runing.

For mysql v3 there are the posible runing files:
mysqld.exe
mysqld-max.exe
mysqld-max-nt.exe
mysqld-nt.exe
mysqld-opt.exe
or on Win98 only winmysqladmin.exe?
For mysqlv4 .. im not sure yet
For mysql 5 seems to be more simple, only
mysqld-nt.exe

Do I have to search for all these files(and others that I dont know yet :) ) to be sure that its not runing?

Choosing Correct MYSQL
I am setting up tables to store data sent from FCKeditor.
What type of column am I best to use for storing the html code?

Choosing Correct MYSQL Column Type
I am setting up tables to store data sent from FCKeditor. What type of column am I best to use for storing the html code?

Migrating A MySQL Db From Plesk Over To CPanel - Possibly Differant Versions Aswell ?
Hey all. As title, i had hosting on a plesk server, but was migrating everything over to cPanel due to a better package.

Ive run into some problems though, mainly due to differant versions i think. Anyone know of a way around this as it would be alot of work redoing the whole sites again

Versions
I have MySQL 5.0.24 installed on a XP Pro SP2 PC. The latest version is 5.0.41. I looked at the change logs and they say they are bug fixes only. Have there been any security issues with 5.0.24 that I should be aware of? Do I need to move to 5.0.41 to be safe?

Run 2 Versions
Is it possible to run both
MySQL 3.23 and
MySQL 5,
at the same time on the same machine with php4.3.0 and apache 1.3.27?
What should I consider ?

Two Versions
I wanna run MySQL 3.23.54 and MySQL 5.0 in the same Redhat Linux 9 box at the same time. Is it possible?

Differences Between Versions
We have two versions of mySQL running; version 4.1.15 on a couple of local machines under Windows XP Professional and our public database running 3.23.58 under Apache.

I was populating a new field in our members table based upon a match to a table called region using the following query

UPDATE members,region set members.FPosition_Id = 19
where region.Region_Commodore_Id > 0 and
region.Region_Commodore_Id = members.member_Id

The query ran fine locally (ver 4) but gave a syntax error on version 3. Is there a list of differences/updates between these two versions? Does version 3 not support update queries using multiple tables?

I tried parenthasizing the where statement but that made no change.

Versions Of AMP On Windows?
I am somewhat concerned that i have the right versions
of AMP on my Win XP system so it will all work together...
Is there some link that (in simple terms!) tells which versions are safe
together?

I currently have MySQL version 4.0.20d, with Apache 2.0.52 and php
4.3.10. Is this the best combination?

Two Versions On Same Machine
I had MySQL 4.2 - working fine. I saw version 5 is now stable so I downloaded and installed but did not run it (I think!). Carried on with 4.2.

Then one day MySQLAdmin and Query would not log me on. I checked via the cmd line utility and when I typed in the password the window dissappeared!

I opened MySQLAdmin again and reconfigured the log-on o 3307 (I remember this was default when I installed 5.0). OK, the server must be running. So keep with 5.0 as I managed to restore one of my schemas. I wanted a later version which is only in the 4.1 directories and copied it across BUT 5.0 does not see it. But when I go to stop and restart the 5.0 server in Admin as soon as I go to the server tab to do this it stops automatically! AND will not restart.

Comparing Versions Of Sql
I'm taking up a new position and have never used sql before although use
and code in lots of other languages. When doing a bit of survey I find
many many versions of commercial and public versions of sql. Can anyone
tell me if the syntax is generally similar or are they completely
different. If I invest time learning mysql on XP or Linux will that be
useful if I end up using something like Oracle later on? The only one I
would avoid is MS.... like things that work occasionally.

Removing Old Versions
I loaded a new version of Mandrake Linux 10.0 CE and have also installed and dowloaded a new version of MySQL 4. I'm not sure but think I have several versions installed and running ...

How can I check to see what is installed, what is currently running, and then perhaps remove them all and start by installing single new copy?

Compatibility Between Versions Of SQL
Hi! Would like to enquire if different versions of SQL are compatible to one another.
I've done some code in PHP and which requires access to MySQL on my server. I have tested it on localhost and everything worked fine. Hence, i decided to upload both my code and the database i created to the server. That's when the prob started. I received this msg while trying to view my page:

Could not connect to database: Can't connect to local MySQL server through socket '/tmp/mysql.sock' (111)

what this is about? For info, my MySQL version on my personal computer is 5.0 while that of the server is 3.23. Are the database compatible?

How To Keep Trace Of The Versions From A Table
From the Code that is been written below i need to keep trace of the versions that are been read from the file(test1.lst) each time it is been changed.Does anyone know as to how i can store it in diff tables(version_0701151004 version0701151100,version_0701161000 ....versionYYMMDDHHMM) each time when this query is been called? n how to keep trace of the date and time ?

or maybe is there any other method where i can store diff versions in diff files ? would be gratefull for any advice

--DROP TABLE stocklist_values;

CREATE TABLE stocklist_values(
SAG_FREIGABE INT(1) NOT NULL,
SAG_SNR VARCHAR(50) NOT NULL,
SAG_NAME VARCHAR(40),
GSM_RELEASE_VON VARCHAR(20));

LOAD DATA INFILE '/home/user945/database/test1.txt' INTO TABLE stocklist_values FIELDS TERMINATED BY '&'

Moving A Database Between Different Versions
I'm trying to move a database on a server with MySQL 4.1.19 to another with MySQL 4.0.27. Is this possible? I'm getting errors when trying to import the database.

XAMPP And MAMP Versions
I'm running an XAMPP version of mysql on a PC and the MAMP version on a Macintosh.
I just realized that I needed to change a couple of tables.
Can I change them on the MAMP version and then copy the appropriate files to the XAMPP version, and expect them to work?

Which files should I copy over ... .MYI, .MYD or both?

The MAC version is 5.0.19
The PC version is 5.0.27

I use Navicat to modify my tables on the mac and do not have this product for the pc.

Import Export With Different Versions
I am hosting a WP site locally on my computer, to test it before putting it online,
Now I have the hosted WP site online & ready to go, but I am having trouble loading the backup data from my computer into it.
When I go to import in the myPHP section, it gives me an error message of:
Import failed, You probably tried to load too big a file.
But the file is only 350kb! The max is 8Megs!
Double checking, it looks like the 2 databases are different versions. Would this be the problem?
If so, how do I go about downgrading the version on my computer? And once done, how would I transfer my posts & info onto it?

Compatible Versions Of Software
MySQL, Apache and Php are a fairly common trio from what i gather .... but there can be alot of problems getting them to talk to each other.

Windows And Linux Versions
I would like to know what are the main differences between windows and linux versions of this DB system.

I´m using it on linux but i´m planning to migrate to windows...

Is there any performance difference? Is it as solid as linux version? It´s of free use (under GPL) ?

I made a test here in windows and it seems to work well..

Which Design Would Be Correct?
I have registered users, and these users can belong to a group. I'm trying to decide whether or not i should keep this group_id in the users table, or to create a cross referencing table and just keep the user_id and group_id in there. the cross reference table will allow for users to be associated with more than one group. and just keeping the group_id in my users table will allow me to avoid a few joins in some queries but only allow one user per group... any opinions on this matter? after typing this i feel as though creating the referencing table would be the better idea.. but i still would love to hear other opinions.

Which One Ini File Is The Correct One ?
I have install mysql in my windows machine.The confusion part here is that I find there 7 different ini files. The files are my.ini,my-huge.ini,my-innodb-heavy-4G.ini,my-large.ini,my-medium.ini,my-small.ini and my-template.ini. So which one is being used as the configuration files. I assume it is the my.ini one right ? So why is there so many other ini files? My another question is that in my.ini I dont find the option for the bin-log settings but ? Because I want to the option of binary log to be enable to allow me to trace back if there is any mistake ?

Correct Syntax
I have a database of addresses where I am trying to remove rows that have a particular duplicate field.
For example, say there are 15 rows in the table sales_info that have the value 'Mr. Smith' in the contact_name column.
I've tried using the following command but received an error (1064 check you manual for the right syntax):

UPDATE sales_info
DELETE* FROM sales_info
WHERE contact_name IS NOT UNIQUE;

Can anybody help me with the right syntax to use?

Correct Results From Db
I have a column of type text, in this column I am adding in numbers that relate to another column in the table. For example the column in question could end up having the following data in it: 1, 2, 6, 9, etc

The problem I am having is if I want to return all the results that relate to lets say the number 1 and if the column in question has more numbers in it than the number 1, I don't get anything returned.
Is this an error with my ASP script or the way the data is stored in the dababase. Do I need to change the data type,

Correct Join For DELETE
Whats is the correct syntax to delete from a table using joins to associate the id?
I have sommin like:
mysql_query("DELETE FROM gallery
LEFT JOIN gallery_subcat as s ON s.subcat_id = g.subcat_id
WHERE s.maincat_id='".NumValidate($_GET['maincat_id'])."'");

Is This Search Arranging Correct?
If I want to filter results from using a LIKE search if I ORDER it by the field it's searching will it return results based on the number of times what I am searching for occurs in the field?

Correct Use Of MERGE Tables?
I have seen general MERGE table usage for logging where a table is created for a fixed period of time, e.g. a month.

I am looking to do something different. I currently have a very large table, let's call it emails. There are say a million rows in here. The problem is queries running against this can be slow especially any queries against rows that are not indexed (not all of them can be).

What I am thus thinking is to use MERGE tables. Any email that has not been opened in the last year would be moved into an acrhive table. Then what is now the emails table would be renamed so I have emails_archive and emails_current and create the MERGE table emails.

Then, any searches would be run on emails_current unless a checkbox was clicked to run on *all* emails.

Is this a correct way to use MERGE tables? Is moving rows from emails_current to emails_archive going to be a problem with indexes and unique keys? I believe I can insert rows into the MERGE table and they will by phyiscally put inside emails_current but will check the unique indexes on both the tables.

Correct Wrong Spelling
Is it possible with mySQL to get results when the spelling is not exactly correct. E.g. a visitor fills out the field with Amstrdam (note that the "e" is missing). Is there a function for mySQL that also shows results similar to Amstrdam:
-Amsterdam
-Amsteldam

Correct Search Query
Can anyone help me out with this please. I am looking at searching among comma delimited id's stored inside "IDs", trying to figure out what the correct SQL query for that would be. I need to extract the ID where IDs contains the value 7. I know I can't use something like "WHERE IDs LIKE '%7%'" because the result would be inaccurate. So how do I go about it, please? Any directions would be appreciated, thanks!

+------+-----------+
| ID | IDs |
+------+-----------+
| 1 | 3,17,20 |
+------+-----------+
| 2 | 1,7,9,12 |
+------+-----------+

Picking The Correct Date
My client's art gallery site has a page that lists the current show and the upcoming show. Each show is a approx a month long, and the dates can overlap.

Instead of making the gallery owner update the database with a checkbox indicating which show is current and which is upcoming, I'm trying to automate this page so that mysql will decide upon which show is current and upcoming and display the correct one. Unfortunately, this isn't working as planned.

PHP

CREATE TABLE `shows` (
  `show_id` int(10) unsigned NOT NULL auto_increment,
  `show_name` varchar(30) default NULL,
  `show_text` text,
  `show_postcard_img` varchar(60) NOT NULL default '',
  `show_start_date` datetime default NULL,
  `show_end_date` datetime default NULL,
  PRIMARY KEY  (`show_id`)
) ENGINE=MyISAM  DEFAULT CHARSET=latin1;

--
-- Dumping data for table `shows`
--

INSERT INTO `shows` VALUES (1, 'Grand Opening', 'txt', 'postcard1.jpg', &#55614;&#57159;-09-08 16:52:08', &#55614;&#57159;-10-06 16:52:13');
INSERT INTO `shows` VALUES (2, 'Current Show', ' txt', 'postcard2.jpg', &#55614;&#57159;-10-13 17:18:00', &#55614;&#57159;-11-13 17:18:00');
INSERT INTO `shows` VALUES (3, 'Upcoming Show', 'txt', 'postcard3.jpg', &#55614;&#57159;-11-17 11:53:26', &#55614;&#57159;-12-14 11:53:34');

$query_current_show = "
SELECT show_id,show_name, show_postcard_img
FROM shows
WHERE MONTH(show_start_date) = MONTH(NOW())
AND YEAR(show_start_date) = YEAR(NOW())
OR MONTH(show_end_date) = MONTH(NOW())
AND YEAR(show_end_date) = YEAR(NOW())";

$query_upcoming_show = "
SELECT show_id,show_name, show_postcard_img
FROM shows
WHERE MONTH(show_start_date) > MONTH(NOW())
AND YEAR(show_start_date) = YEAR(NOW())
LIMIT 1";

As of yesterday, show 2 "Current Show" should be the current show, and show 3 "Upcoming Show" should be showing as the upcoming show. Instead, show 1 is still current and the upcoming show is show 3.

Correct Datatype Question
I'm trying to construct a database containing information that will eventually be brought into a flash movie. It's basically information to be used in a digital clothing catalogue slideshow. I need to include the following information for each clothing item:

Style Number
Description
Colours
Sizes

I was just going to create 4 tables (haven't decided yet how these will be structured) but just wanted to ask a question about the description column. I was going to make this a text datatype even though information included in it would be be repeated. That is possible information could be a number of sleeve lengths, cuff types, fabric compositions, collar types etc. All of these could very well be placed in separate tables to avoide redundancy but I just wondered if, in this particular instance, it is really necessary to do so.

I was going to create a simple CMS so that the client could enter new items, ie. style number, description, colours, sizes and then maybe have the ability to delete these items. So I guess my question is should I be using a text datatype for the description or be breaking the information up further?

Need To Know How To Group By To Get Correct Count
In the following sample data, I have a field called x_duration which is the duration in seconds for a particular record in the database. The table is denormalized so that one row equates to one 'play' or 'session' for a particular track.

I need to create a view to support a reporting application where, among other metrics, I need to show how many records we have where x_duration >=15 seconds and how many records we have where x_duration >=20 seconds. Additionally, I need to sum the x_duration for all records....

Correct Import Command
i am having trouble importing a database into MySql 5.0

i have created a database and have the .sql file ready but when i type in my command i never get the next step.

database name = bdatabank

command I am trying to use from the mysql> prompt is below:

-u username -p -s bdatabank < BDB-sql-2007-11-16.sql

--after typing this and pressing enter i should be getting the 'Enter Passwor' prompt. but all it get is another blank line with a prompt of ->

am i miss typing something?

Correct Syntax For An Update
two databases, one has an out of date email field.
I need the new table to update the email field on the old table.

My query selects the rows with the wrong email address:
select * FROM `oldtable` , `newtable` WHERE oldtable.memberid = newtable.memberid and oldtable.Email != newtable.email

but how do I update it?
update`oldtable`set oldtable.Email = newtable.email where oldtable.memberid = newtable.memberid

My above query fails.