By Thomas Kyte
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A necessary part of safe coding within the Java programming language is a well-documented and enforceable coding typical. Coding criteria inspire programmers to keep on with a uniform algorithm decided via the necessities of the venture and association, instead of through the programmer’s familiarity or choice.
"Protect your databases from undefined, software program, and operator disasters utilizing the unique details during this Oracle Press consultant. Oracle RMAN 11g Backup and restoration explains easy methods to configure databases, generate exact data, and perform approach restores. paintings from the command line or Oracle company supervisor, automate the backup technique, practice Oracle Flashback recoveries, and combine cloud computing expertise.
Accelerate the execution of vital database queries by way of making reliable offerings approximately which indexes to create. pick out right index forms for various eventualities. keep away from indexing pitfalls that could even have indexes hurting functionality instead of assisting. retain indexes in an effort to supply constant and predictable question reaction over the life of an software.
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Additional resources for Expert Oracle Database Architecture: Oracle Database 9i, 10g, and 11g Programming Techniques and Solutions, Second Edition
If you use literals (constants) in the query, then every query is a brand-new query, never before seen by the database. It will have to be parsed, qualified (names resolved), security-checked, optimized, and so on. In short, each and every unique statement you execute will have to be compiled every time it is executed. The second query uses a bind variable, :empno, the value of which is supplied at query execution time. This query is compiled once and then the query plan is stored in a shared pool (the library cache), from which it can be retrieved and reused.
How to measure performance. • 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 and how easy it was to get that information. Most importantly, they saw how big of a difference taking advantage of database features could make to the performance of their application. In the end, they were successful—just behind schedule by a couple of weeks.
Now this may seem like a long list of things to learn before you start, but consider this analogy for a second: if you were developing a highly scalable, enterprise application on a brand-new operating system (OS), what would be the first thing you’d do? ” If that wasn’t your answer, you’d most likely fail. Consider, for example, Windows vs. Linux. If you are a long-time Windows programmer and were asked to develop a new application on the Linux platform, you’d have to relearn a couple of things.
Expert Oracle Database Architecture: Oracle Database 9i, 10g, and 11g Programming Techniques and Solutions, Second Edition by Thomas Kyte