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The following page has been changed by KevinWilliams: http://wiki.apache.org/ws/Tuscany/TuscanyJava/DAS_Java_Overview/RDBDAS_Java_User_Guide/Partial_Update ------------------------------------------------------------------------------ UPDATE CUSTOMER SET FIRSTNAME = ?, SET LASTNAME = ?, SET ADDRESS = ?, SET PHONE = ?, SET AGE = ?, SET SHOESIZE = ? WHERE ID = ? }}} - There are a couple of very good reasons for using a partial update approach. For one, a performance boost can be reaized by applications writing to very wide tables. For example, this author has seen customer tables with over 100 columns. I can be a waste of resources to update 100 columns when only one was modified. Another reason is that some databases also employ [http://en.wikipedia.org/wiki/Database_trigger triggers] on specific columns in a table. + There are a couple of very good reasons for using a partial update approach. For one, a performance boost can be reaized by applications writing to very wide tables. For example, this author has seen customer tables with over 100 columns. I can be a waste of resources to update 100 columns when only one was modified. Another reason is that some databases also employ [http://en.wikipedia.org/wiki/Database_trigger triggers] on specific columns in a table. Prtial updates are necessary when column triggers are employed to avoid tripping the trigger on every row update rather than only on updates to the specific column. --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
