RE: Migration from ORACLE 9i to MySQL
Why are you going backwards MySql is an 8th grade toy. -Original Message- From: Nguyen, Phong [mailto:[EMAIL PROTECTED] Sent: Thursday, July 28, 2005 9:42 AM To: mysql@lists.mysql.com Subject: Migration from ORACLE 9i to MySQL I will be migrating Oracle database 9i to Mysql. Do anyone have any experience in doing this?. Please share with us! Thank you very much, V/R, Nguyen -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe: http://lists.mysql.com/[EMAIL PROTECTED] -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/[EMAIL PROTECTED]
(FOUO) RE: data-warehouse ETL with MySQL
CLASSIFICATION: UNCLASSIFIED SECURITY CONTROL MARKING: FOR OFFICIAL USE ONLY Perhaps Oracle will do a better job for you in this area. -Original Message- From: Tom Cunningham [mailto:[EMAIL PROTECTED] Sent: Friday, January 14, 2005 3:16 AM To: mysql@lists.mysql.com Subject: data-warehouse ETL with MySQL Hi everybody. This is just a note to tell people what I'm doing, hoping I might get some comments. In short: I have been using MySQL SQL scripts to do data-warehouse ETL for about 6 months. It's gone well, but perhaps getting a little creaky now. The general format is this: 1. Add any new records to my dimensions, if not already there. Done with a LEFT JOIN dimension ON (..dimension attributes..) WHERE dimension.pk IS NULL 2. Insert the facts, using the dimensional keys. 3. Update the fact records' other columns. The predictable problem I'm having is the lack of abstractness of SQL, so I have to repeat things which I don't want to repeat. I'm looking at an alternative, which may cut down repetition, and I'm curious if anyone else has thought or written about this sort of stuff. The alternative: 1. Put *all* the ETL data into a flat table first. 2. Have a unique index on *all* the rows in my slowly-changing dimension. So new dimension records are simply added with an INSERT IGNORE from the flat table. 3. Insert the facts from the flat table using NATURAL JOINs with the dimension tables. This second approach has advantages disadvantages: GOOD: Less mentioning of column names, so the script is shorter more robust to change. GOOD: The last advantage particularly good for what I'd call attribute-combination columns than the other method, where the dimension has no natural key. BAD: All dimension columns must be considered to be slowly-changing (becuase of the unique key and natural join) - though doesn't seem serious problem now. I have some sample scripts fleshing these ideas out more, if anyone's interested (tom, at, videoisland, dot, com). -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe: http://lists.mysql.com/[EMAIL PROTECTED] Classification: UNCLASSIFIED Security Control Marking: FOR OFFICIAL USE ONLY -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/[EMAIL PROTECTED]
(U) Chris Rock Lights it up !!!!
CLASSIFICATION: UNCLASSIFIED http://www.laserp.com/chris_rockfp.htm Classification: UNCLASSIFIED -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/[EMAIL PROTECTED]
(U) RE: Very Strange data corruption
CLASSIFICATION: UNCLASSIFIED who knows -Original Message- From: Mike Johnson [mailto:[EMAIL PROTECTED] Sent: Tuesday, May 25, 2004 12:26 PM To: David Griffiths; [EMAIL PROTECTED] Subject: RE: Very Strange data corruption From: David Griffiths [mailto:[EMAIL PROTECTED] MySQL really should throw an exception/error rather than just quietly trim your data and accept it. When your data is critical, and your business depends on it, you can't have bad data quietly going into the database. Someone correct me if I'm wrong, but isn't it considered best practice to validate data before it gets to the database? I can't seem to find a source for this after a quick search on Google, though... -- Mike Johnson Web Developer Smarter Living, Inc. phone (617) 886-5539 -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe: http://lists.mysql.com/[EMAIL PROTECTED] Classification: UNCLASSIFIED -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/[EMAIL PROTECTED]
(FOUO) Anyone seen any Banking/Database Web applications ....
CLASSIFICATION: UNCLASSIFIED SECURITY CONTROL MARKING: FOR OFFICIAL USE ONLY I am looking for a Banking Web application with all the Web pages, content and Database behind it. Any example will do. Thanks, Mike Classification: UNCLASSIFIED Security Control Marking: FOR OFFICIAL USE ONLY -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/[EMAIL PROTECTED]
(U) several questions ...
CLASSIFICATION: UNCLASSIFIED Is there a board / site that has a plethora of MySQL scripts that I can Borrow for my own use ? Is there a site that has all of the error codes listed, the cause and possible solutions to fixing these ? Is there a way to write dynamic SQL in MySQL like we do in Oracle ? Classification: UNCLASSIFIED -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/[EMAIL PROTECTED]
RE: MySQL 4.1, derived tables, and privileges
Dude ... You got the same name as me ... So does that mean I can blame any idiotic statements I make on you ? We got a popular name. Mike -Original Message- From: Michael Johnson [mailto:[EMAIL PROTECTED] Sent: Thursday, September 04, 2003 8:51 AM To: [EMAIL PROTECTED] Subject: MySQL 4.1, derived tables, and privileges I hope someone can help me on this. I've searched the mailing list archives and the manual and can't find anything, except for user comments in the manual that confirm what I'm finding. I'm using derived tables users with restricted privileges. The only way I can get the derived tables to work though is to give the user global SELECT privileges. I don't want to do this. Am I missing something? If not, is there a way around this problem? The error I get is: #1142 - select command denied to user: '[EMAIL PROTECTED]' for table '/tmp/#sql_135_0' My select looks something like: SELECT t1id as Key, IFNULL(k2, dfltValue) as Value FROM t1 NATURAL JOIN (SELECT t1id, k2 FROM t2 WHERE k3=1) as derived; My tables have the columns: t1: t1id, dfltValue 1 a 2 b t2: t1id, k2, k3 1c 1 1d 2 2e 2 Note that not all values of t1id exist in t2 for a given k3. Hence, this select gets all t1id keys with a default value if it doesn't exist in t2. Desired result: Key Value 1c 2b The privileges for [EMAIL PROTECTED] are: No global priveleges (setting Create_tmp_table_priv makes no difference) t1: SELECT, REFERENCES t2: SELECT, INSERT, UPDATE, REFERENCES If I grant global SELECT it works as expected. Again, create_tmp_table_priv is irrelevant at this point. Any thoughts on why this is working like this? Thanks, Michael PS If there is a better way to do this query, I'd like to know that, too, but I've run into this problem at other places where I *know* I have to use derived tables, so the problem is still pertinent to my use. -- Michael Johnson [EMAIL PROTECTED] Internet Application Programmer, Pitsco, Inc. 620-231-2424x516 -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe: http://lists.mysql.com/[EMAIL PROTECTED] -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/[EMAIL PROTECTED]
RE: Oracle DBA here looking for advice on MySQL ....
I went thru the documentation this weekend on it and found that there is really not to much to this database. One thing we learn as Oracle DBA's is how the whole database starts up and how all those processes work together and where to find bottlenecks when things start to bog down.It didnt see any of that in the MySQL docs I read. I appears that MySQL has some potential though. Mike -Original Message- From: Andy Jackman [mailto:[EMAIL PROTECTED] Sent: Tuesday, August 19, 2003 12:29 AM To: Johnson, Michael Cc: MySQL Users Subject: Re: Oracle DBA here looking for advice on MySQL I've used a lot of Oracle, some MS Access and I'm newish to MySQL. I found it easy to write an abstraction layer for Ms Access and Oracle despite their different approaches to some important things. I find MySQL very sparse by comparison and I spend more time working round the db than working with it. Unlike Oracle the richness and integrity of language is simply missing - these people have lived without something as useful as sub-queries for a long time. (The argument being that speed and data integrity are all-important). It's more a file system than a relational database. I know you asked about books rather than a comparison of the products, but the software philosophy is reflected in the documentation. If someone else pays you to be an Oracle Dba then I bet you have at least a 10 foot shelf of comprehensive documentation. This list is about as good as it gets (see your previous response). There is a PDF copy of the manual somewhere and setting up MySql was accompilshed by a colleague who wouldn't have known where to start with Oracle, so it has that in its favour. So, if you're thinking of migrating, think carefully! If I could get Oracle to give me a sensible price (say USD 1000) to sell their db with my product I would be out of here so fast. So far with mySQL i've written my own database for a particular (simple) structure that it wouldn't handle to my satisfaction; I've written my own date/time routines to calculate things like seconds between 2 datetimes (despite a wealth of datatime functions, this one isn't available unless you convert to 'Unix' dates which expire in 2036) and I've written functions to handle the fact that in 'C' all data is returned as strings rather than as native data types. Sigh. - Andy Johnson, Michael wrote: What is the best book on MySQL with regard to its Architecture and how it starts up, shutdowns, processes queries, rolls back data, etc etc. ? I am not looking for a SQL book here. What is the best My SQL book you have read ? Thank you in advance. Mike -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe: http://lists.mysql.com/[EMAIL PROTECTED] -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/[EMAIL PROTECTED]
Oracle DBA here looking for advice on MySQL ....
What is the best book on MySQL with regard to its Architecture and how it starts up, shutdowns, processes queries, rolls back data, etc etc. ? I am not looking for a SQL book here. What is the best My SQL book you have read ? Thank you in advance. Mike -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/[EMAIL PROTECTED]
