Read e-book online Expert Oracle JDBC Programming PDF

By R.M. Menon

ISBN-10: 1430200294

ISBN-13: 9781430200291

ISBN-10: 159059407X

ISBN-13: 9781590594070

JDBC is the main ordinary API in Java to entry and manage information in a database. Oracle is likely one of the most well liked and scalable databases on the planet. This ebook is a must have for any developer development an software that employs JDBC on Oracle database. not like different JDBC books, this booklet has been written to counterpoint now not rehash the contents of Oracle JDBC documentation and the JDBC specification.

The publication teaches you not only the best way to write JDBC code, yet how one can write effective JDBC code in a step by step type. This e-book doesn't think any previous wisdom of JDBC, even though it does think uncomplicated wisdom of SQL and PL/SQL. It covers JDBC with a spotlight on writing high-performing, scalable and safe purposes for Oracle 10g and 9i.

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Example text

It’s a simple utility that summarizes a large set of detailed information in a given trace file so that it can be understood for performance tuning. This section explains briefly how to use this very useful utility. In its simplest form, tkprof can be invoked as shown here: tkprof To illustrate the joint use of tkprof and sql_trace, we’ll set up a simple example. Specifically, we’ll trace the query used previously in the autotrace example and generate a report from the resulting trace file.

This section explains briefly how to use this very useful utility. In its simplest form, tkprof can be invoked as shown here: tkprof To illustrate the joint use of tkprof and sql_trace, we’ll set up a simple example. Specifically, we’ll trace the query used previously in the autotrace example and generate a report from the resulting trace file. trc SQL> alter session set timed_statistics=true; Session altered. CHAPTER 1 ■ PERFORMANCE TOOLKIT SQL> alter session set sql_trace=true; Session altered.

Note See the section “How Oracle Locks Data” of Chapter 13 in Oracle Database Concepts Guide (10g Release 1) for a detailed explanation of how locks work in Oracle. The consequence of this row-level locking scheme is that writes don’t block writes unless the contending write operations are “writing” a common set of rows. For example, if two sessions are updating the same table but update a mutually exclusive set of rows, they don’t block each other. Only when they try to update the same row(s) does one of the sessions get blocked until the other session issues a commit or a rollback to end its transaction.

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Expert Oracle JDBC Programming by R.M. Menon


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