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It doesn't matter what DBMS you're using—Oracle, DB2, SQL Server, MySQL, PostgreSQL—misunderstandings can continually come up over the right meanings of phrases, misunderstandings that could have a major influence at the luck of your database tasks. for instance, listed below are a few universal database phrases: characteristic, BCNF, consistency, denormalization, predicate, repeating workforce, sign up for dependency.
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How to see where the bottlenecks were. • How and what to index. And so on. At the end of the week the developers, who had been insulated from the database, were amazed at what the database could actually provide for them, how easy it was to get that information and, most importantly, how big a difference it could make to the performance of their application. ) but in the end they were successful - just behind schedule by a couple of weeks. This is not a criticism of tools or technologies like EJBs and container managed persistence.
So, if y o u run the example in Chapter 19, Java Stored Procedures'. SQLException; you will find that in order to drop it, you need to: [email protected]> drop java source "demo"; Java dropped. Remember to use the double quotes around the identifier for Java objects as they are created and stored in mixed case. P S B ^ s i o n a l ö r a c l e P mmingProfessiorialO Stitój nalOra f e s s io ingPro ammingProfess Developing Successful Oracle Applications I spend the bulk of my time working with Oracle database software and, more to the point, with people who use this software.
Techniques that work well if everything happens consecutively do not work so well when everyone does them simultaneously. If you don't have a good grasp of how your particular database implements concurrency control mechanisms, then you will: • Corrupt the integrity of your data. • Run slower than you should with a small number of users. • Decrease your ability to scale to a large number of users. ' but rather that invariably you will do these things. You will do these things without even realizing it.