Re: Differences Between ORACLE SQL PLus and MYSQL SQL
Hi, Could you please tell us what are the differences between ORACLE SQL plus and MYSQL SQL? We developed oracle sql plus is a client side application to execute SQL statements. oracle sql is Oracles version of standard SQL (which is not standard) and mysql sql is MySQLs version of standard SQL, which is not standard either. application using ColdFusion with Oracle. Now I like to point my application to mysql database. How do I fix my application to work with Mysql? Remove any Oracle specific syntax, try to find the SQL standard syntax for it - if available - and if that doesn't work, try the MySQL version of the SQL. With regards, Martijn Tonies Database Workbench - tool for InterBase, Firebird, MySQL, Oracle MS SQL Server Upscene Productions http://www.upscene.com Database development questions? Check the forum! http://www.databasedevelopmentforum.com -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/[EMAIL PROTECTED]
Re: Differences Between ORACLE SQL PLus and MYSQL SQL
Phong Nguyen [EMAIL PROTECTED] wrote on 09/15/2005 10:56:57 AM: All, Could you please tell us what are the differences between ORACLE SQL plus and MYSQL SQL? We developed application using ColdFusion with Oracle. Now I like to point my application to mysql database. How do I fix my application to work with Mysql? Thankyou You asked basically two questions: a) what are the differences between ORACLE SQL plus and MYSQL? First, I must refer you to the official MySQL documentation. Everything you will need to know to answer your question will be in there. I am assuming that you already understand Oracle SQL Plus, as you are using it. http://dev.mysql.com/doc/mysql/en/index.html It does not do a point-by-point comparison between the two products you list but if you understand Oracle and read this to see how you form the MySQL equivalent to each Oracle statement you use (you can skip around to read just the parts you need then come back and get the rest later), the differences will be readily apparent. If you do not already understand your Oracle back-end, you have a serious disadvantage to making this a smooth transition. b) How do I fix my application to work with Mysql? The simple answer is: Change your website's code to use a compatible MySQL client library and modify all SQL statements to be MySQL compatible. Exactly how you do that with the environment you specified, I don't have a clue. I looked at Cold Fusion once (several years ago) so how that tool helps to automate the development of the data storage and retrieval process is beyond me. How much you need to change your SQL statements depends on how they are with MySQL already. One well-known point on how MySQL and Oracle differ is in how to define a JOIN in a SQL statement. MySQL works best if you use the explicit [INNER|LEFT|RIGHT] JOIN ... ON ... format. AFAIK, Oracle does not support this syntax. I wish you well. If you have any specific translation issues that you cannot resolve by reading the manual, please bring it back to the list. I am sure someone will be able to help. Shawn Green Database Administrator Unimin Corporation - Spruce Pine
Re: Differences Between ORACLE SQL PLus and MYSQL SQL
On Fri, 16 Sep 2005 10:32:23 -0400 [EMAIL PROTECTED] wrote: You asked basically two questions: a) what are the differences between ORACLE SQL plus and MYSQL? snip depends on how they are with MySQL already. One well-known point on how MySQL and Oracle differ is in how to define a JOIN in a SQL statement. MySQL works best if you use the explicit [INNER|LEFT|RIGHT] JOIN ... ON ... format. AFAIK, Oracle does not support this syntax. All these questions are also dependant on which version of which software you are using. In Oracle 8i the above is certainly true, you have to use the doofy (+) syntax for outer joins, etc. In Oracle 10g though the more verbose syntax is supported: http://download-west.oracle.com/docs/cd/B14117_01/server.101/b10759/statements_10002.htm#sthref7225 You can do LEFT INNER, RIGHT INNER, LEFT OUTER, RIGHT OUTER, FULL OUTER, etc. using the same syntax as MySQL. I'm not sure but some versions of MySQL also had different results from Oracle depending on how you defined the join condition in an OUTER join. So what version of MySQL you choose also has consequences on portability (e.g. sub-queries, views, etc) There are enough little differences between all DBMS's that make porting a real challenge. Bottom line, you're going to have to do a LOT of research and testing. I would seriously consider looking at a database abstraction layer. In ColdFusion I have no idea what is available, but for PhP you'd want to look at something like ADOBD (http://adodb.sourceforge.net) or PDO/MDB/Metabase, etc. Good luck, Josh -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/[EMAIL PROTECTED]
